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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2013	Jul. 25, 2013
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Entity Registrant Name	HEALTHSTREAM INC
Entity Central Index Key	0001095565
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		26,818,956

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 54,651	$ 41,365
Marketable securities - short-term	46,777	51,952
Accounts receivable, net of allowance for doubtful accounts of $234 and $142 at June 30, 2013 and December 31, 2012, respectively	21,778	15,348
Accounts receivable - unbilled	776	1,163
Deferred tax assets, current	549	2,459
Prepaid royalties, net of amortization	2,237	3,738
Other prepaid expenses and other current assets	3,007	2,266
Total current assets	129,775	118,291
Property and equipment:
Equipment	19,241	18,108
Leasehold improvements	5,077	5,050
Furniture and fixtures	3,452	3,368
Property and equipment, gross	27,770	26,526
Less accumulated depreciation and amortization	(20,279)	(18,706)
Total, property and equipment	7,491	7,820
Capitalized software development, net of accumulated amortization of $12,342 and $10,987 at June 30, 2013 and December 31, 2012, respectively	10,391	9,732
Goodwill	29,432	29,299
Intangible assets, net of accumulated amortization of $10,803 and $10,036 at June 30, 2013 and December 31, 2012, respectively	8,039	8,805
Other assets	758	581
Total assets	185,886	174,528
Current liabilities:
Accounts payable	1,605	1,057
Accrued liabilities	8,530	9,708
Accrued compensation and related expenses	1,322	1,121
Deferred revenue	28,541	23,146
Total current liabilities	39,998	35,032
Deferred tax liabilities, noncurrent	6,474	6,474
Other long term liabilities	675	826
Commitments and contingencies
Shareholders' equity:
Common stock, no par value, 75,000 shares authorized; 26,805 and 26,233 shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively	160,254	158,020
Accumulated deficit	(21,480)	(25,842)
Accumulated other comprehensive income (loss)	(35)	18
Total shareholders' equity	138,739	132,196
Total liabilities and shareholders' equity	$ 185,886	$ 174,528

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts, net	$ 234	$ 142
Accumulated amortization on capitalized software development	12,342	10,987
Accumulated amortization on intangible assets	$ 10,803	$ 10,036
Common stock, no par value
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	26,805	26,233
Common stock, shares outstanding	26,805	26,233

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Revenues, net	$ 31,919	$ 25,841	$ 61,565	$ 49,514
Operating costs and expenses:
Cost of revenues (excluding depreciation and amortization)	12,871	10,167	25,391	19,742
Product development	2,778	2,182	5,384	4,051
Sales and marketing	5,450	4,678	10,650	10,214
Other general and administrative expenses	4,817	3,201	9,089	6,019
Depreciation and amortization	1,897	1,572	3,773	3,106
Total operating costs and expenses	27,813	21,800	54,287	43,132
Income from operations	4,106	4,041	7,278	6,382
Other income, net	28	26	75	45
Income before income tax provision	4,134	4,067	7,353	6,427
Income tax provision	1,712	1,640	2,991	2,580
Net income	$ 2,422	$ 2,427	$ 4,362	$ 3,847
Earnings per share:
Basic	$ 0.09	$ 0.09	$ 0.16	$ 0.15
Diluted	$ 0.09	$ 0.09	$ 0.16	$ 0.14
Weighted average shares of common stock outstanding:
Basic	26,722	26,127	26,531	26,063
Diluted	27,649	27,501	27,529	27,418

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,422	$ 2,427	$ 4,362	$ 3,847
Other comprehensive income, net of taxes:
Unrealized gain (loss) on marketable securities	(43)	10	(53)	10
Total other comprehensive income (loss)	(43)	10	(53)	10
Comprehensive income	$ 2,379	$ 2,437	$ 4,309	$ 3,857

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

Condensed Consolidated Statement of Shareholders' Equity - 6 months ended Jun. 30, 2013 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2012	$ 132,196	$ 158,020	$ (25,842)	$ 18
Beginning balance, shares at Dec. 31, 2012		26,233
Net income	4,362		4,362
Comprehensive loss	(53)			(53)
Stock based compensation	710	$ 710
Common stock issued under stock plans, net of shares withheld for employee taxes	1,524	$ 1,524
Common stock issued under stock plans, net of shares withheld for employee taxes, shares		572
Ending balance at Jun. 30, 2013	$ 138,739	$ 160,254	$ (21,480)	$ (35)
Ending balance, shares at Jun. 30, 2013		26,805

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES:
Net income	$ 4,362	$ 3,847
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,773	3,106
Stock based compensation expense	710	541
Deferred income taxes	2,991	2,580
Provision for doubtful accounts	95	50
Changes in operating assets and liabilities:
Accounts and unbilled receivables	(6,144)	(2,319)
Prepaid royalties	1,501	1,511
Other prepaid expenses and other current assets	(820)	(698)
Other assets	787	250
Accounts payable	548	(1,388)
Accrued liabilities and accrued compensation and related expenses and other long-term liabilities	(2,149)	(958)
Deferred revenue	5,387	2,411
Net cash provided by operating activities	11,041	8,933
INVESTING ACTIVITIES:
Acquisition, net of cash acquired	(181)	(2,904)
Changes in other investments	(250)
Proceeds from maturities of investments in marketable securities	55,947	20,000
Purchases of investments in marketable securities	(51,539)	(72,309)
Payments associated with capitalized software development	(2,013)	(1,996)
Purchases of property and equipment	(1,243)	(2,009)
Net cash provided by (used in) investing activities	721	(59,218)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	1,682	722
Taxes paid related to net settlement of equity awards	(158)
Net cash provided by financing activities	1,524	722
Net increase (decrease) in cash and cash equivalents	13,286	(49,563)
Cash and cash equivalents at beginning of period	41,365	76,904
Cash and cash equivalents at end of period	$ 54,651	$ 27,341

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2013
Accounting Policies [Abstract]
Basis of Presentation	1. BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“US GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, condensed consolidated financial statements do not include all of the information and footnotes required by US GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. All significant intercompany transactions have been eliminated in consolidation. Operating results for the three and six months ended June 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. The balance sheet at December 31, 2012 is consistent with the audited financial statements at that date but does not include all of the information and footnotes required by US GAAP for a complete set of financial statements. For further information, refer to the consolidated financial statements and footnotes thereto for the year ended December 31, 2012 (included in the Company’s Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 1, 2013).

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

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+ Details

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	2. INCOME TAXES Income taxes are accounted for using the asset and liability method, whereby deferred tax assets and liabilities are determined based on the temporary differences between the financial statement and tax bases of assets and liabilities measured at tax rates that will be in effect for the year in which the differences are expected to affect taxable income. During the six months ended June 30, 2013 and 2012, the Company recorded a provision for income taxes of $3.0 million and $2.6 million, respectively. The Company’s effective tax rate for the six months ended June 30, 2013 and 2012 was 40.7% and 40.1%, respectively. The Company’s effective tax rate primarily reflects the statutory corporate income tax rate, the net effect of state taxes, and the effect of various permanent tax differences.

Stock Based Compensation

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation

3. STOCK BASED COMPENSATION

The Company maintains two stock incentive plans. The Company accounts for its stock based compensation plans using the fair-value based method for costs related to share-based payments, including stock options and restricted share units (RSUs). During the six months ended June 30, 2013, the Company issued 77,750 RSUs with a weighted average grant date fair value of $21.70 per share, measured based on the closing fair market value of the Company’s stock on the date of grant. During the six months ended June 30, 2012, the Company issued 69,950 RSUs with a weighted average grant date fair value of $23.00 per share, measured based on the closing fair market value of the Company’s stock on the date of grant.

Total stock based compensation expense recorded for the three and six months ended June 30, 2013 and 2012, which is recorded in the condensed consolidated statements of income, is as follows (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Cost of revenues (excluding depreciation and amortization)	$	22	$	11	$	39	$	21
Product development		46		36		79		71
Sales and marketing		43		40		79		77
Other general and administrative		289		212		513		372

Total stock based compensation expense	$	400	$	299	$	710	$	541

Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

4. EARNINGS PER SHARE

Basic earnings per share is computed by dividing the net income available to common shareholders for the period by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing the net income for the period by the weighted average number of common and common equivalent shares outstanding during the period. Common equivalent shares, composed of incremental common shares issuable upon the exercise of stock options and restricted share units subject to vesting are included in diluted earnings per share only to the extent these shares are dilutive. Common equivalent shares are dilutive when the average market price during the period exceeds the exercise price of the underlying shares. The total number of common equivalent shares excluded from the calculations of diluted earnings per share, due to their anti-dilutive effect, was approximately 0.1 million for both the three and six months ended June 30, 2013 and 2012.

The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2013 and 2012 (in thousands, except per share data):


	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Numerator:
Net income	$	2,422	$	2,427	$	4,362	$	3,847

Denominator:
Weighted-average shares outstanding		26,722		26,127		26,531		26,063
Effect of dilutive shares		927		1,374		998		1,355

Weighted-average diluted shares		27,649		27,501		27,529		27,418

Basic earnings per share	$	0.09	$	0.09	$	0.16	$	0.15

Diluted earnings per share	$	0.09	$	0.09	$	0.16	$	0.14

Marketable Securities

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Marketable Securities

5. MARKETABLE SECURITIES

At June 30, 2013 and December 31, 2012, the fair value of marketable securities, which were all classified as available for sale, included the following (in thousands):


	June 30, 2013
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value
Level 1:
Mutual funds	$	5,059	$	10	$	—		$	5,069

Level 2:
Certificates of deposit		2,257		—		—			2,257
Corporate debt securities		39,496		1		(46	)		39,451

Subtotal		41,753		1		(46	)		41,708

Total	$	46,812	$	11	$	(46	)	$	46,777


	December 31, 2012
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value
Level 1:
Mutual funds	$	5,042	$	30	$	—		$	5,072

Level 2:
Certificates of deposit		2,254		—		—			2,254
Commercial paper		3,122		1		—			3,123
Corporate debt securities		27,017		1		(17	)		27,001
U.S. government securities		14,499		3		—			14,502

Subtotal		46,892		5		(17	)		46,880

Total	$	51,934	$	35	$	(17	)	$	51,952

The carrying amounts reported in the condensed consolidated balance sheet approximate the fair value based on quoted market prices or alternative pricing sources and models utilizing market observable inputs. As of June 30, 2013, the Company does not consider any of its marketable securities to be other than temporarily impaired. During the six months ended June 30, 2013 and 2012, the Company did not reclassify any items out of accumulated other comprehensive income to net income.

Business Segments

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Business Segments

6. BUSINESS SEGMENTS

The Company primarily provides services to healthcare organizations and other members within the healthcare industry. The Company’s services are primarily focused on the delivery of learning and talent management products and services (HealthStream Learning & Talent Management), as well as survey and research services (HealthStream Research). The accounting policies of the segments are the same as those described in the summary of significant accounting policies in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.

The Company measures segment performance based on operating income before income taxes and prior to the allocation of certain corporate overhead expenses, interest income, interest expense, and depreciation. The following is the Company’s business segment information as of and for the three and six months ended June 30, 2013 and 2012 (in thousands).


	Three Months Ended June 30,						Six Months Ended June 30,
Revenues	2013			2012			2013			2012
Learning & Talent Management	$	25,126		$	19,305		$	48,267		$	37,103
Research		6,793			6,536			13,298			12,411

Total net revenue	$	31,919		$	25,841		$	61,565		$	49,514

Income from operations
Learning & Talent Management	$	7,514		$	6,108		$	14,330		$	10,865
Research		909			916			1,209			1,195
Unallocated		(4,317	)		(2,983	)		(8,261	)		(5,678	)

Total income from operations	$	4,106		$	4,041		$	7,278		$	6,382


Segment assets *	June 30, 2013		December 31, 2012
Learning & Talent Management	$	48,758	$	46,693
Research		27,113		23,978
Unallocated		110,015		103,857

Total assets	$	185,886	$	174,528

Segment assets include accounts and unbilled receivables, prepaid and other current assets, other assets, capitalized software development, certain property and equipment, and intangible assets. Cash and cash equivalents and marketable securities are not allocated to individual segments, and are included within Unallocated. A significant portion of property and equipment assets are included within Unallocated.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

+ Details

Collaborative Arrangement	6 Months Ended
Collaborative Arrangement	Jun. 30, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Collaborative Arrangement	7. COLLABORATIVE ARRANGEMENT The Company participates in a collaborative arrangement, SimVentures^TM, with Laerdal Medical A/S (Laerdal Medical). The Company receives 50 percent of the profits or losses generated from this collaborative arrangement. For the six months ended June 30, 2013, the Company has recorded approximately $1.2 million of revenues and $1.0 million of expenses related to the collaborative arrangement. For the six months ended June 30, 2012, the Company recorded $0.8 million of revenues and $0.9 million of expenses related to the collaborative arrangement. The Company has also recorded approximately $0.5 million of capitalized software development for SimVentures during 2013.

Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation Expense Recorded in Condensed Consolidated Statements of Income


	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Cost of revenues (excluding depreciation and amortization)	$	22	$	11	$	39	$	21
Product development		46		36		79		71
Sales and marketing		43		40		79		77
Other general and administrative		289		212		513		372

Total stock based compensation expense	$	400	$	299	$	710	$	541

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2013 and 2012 (in thousands, except per share data):


	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Numerator:
Net income	$	2,422	$	2,427	$	4,362	$	3,847

Denominator:
Weighted-average shares outstanding		26,722		26,127		26,531		26,063
Effect of dilutive shares		927		1,374		998		1,355

Weighted-average diluted shares		27,649		27,501		27,529		27,418

Basic earnings per share	$	0.09	$	0.09	$	0.16	$	0.15

Diluted earnings per share	$	0.09	$	0.09	$	0.16	$	0.14

Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Fair Value of Available for Sale Marketable Securities

At June 30, 2013 and December 31, 2012, the fair value of marketable securities, which were all classified as available for sale, included the following (in thousands):


	June 30, 2013
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value
Level 1:
Mutual funds	$	5,059	$	10	$	—		$	5,069

Level 2:
Certificates of deposit		2,257		—		—			2,257
Corporate debt securities		39,496		1		(46	)		39,451

Subtotal		41,753		1		(46	)		41,708

Total	$	46,812	$	11	$	(46	)	$	46,777


	December 31, 2012
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value
Level 1:
Mutual funds	$	5,042	$	30	$	—		$	5,072

Level 2:
Certificates of deposit		2,254		—		—			2,254
Commercial paper		3,122		1		—			3,123
Corporate debt securities		27,017		1		(17	)		27,001
U.S. government securities		14,499		3		—			14,502

Subtotal		46,892		5		(17	)		46,880

Total	$	51,934	$	35	$	(17	)	$	51,952

Business Segments (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Business Segment Information Based on Net Revenues and Net Income from Operations

The following is the Company’s business segment information as of and for the three and six months ended June 30, 2013 and 2012 (in thousands).


	Three Months Ended June 30,						Six Months Ended June 30,
Revenues	2013			2012			2013			2012
Learning & Talent Management	$	25,126		$	19,305		$	48,267		$	37,103
Research		6,793			6,536			13,298			12,411

Total net revenue	$	31,919		$	25,841		$	61,565		$	49,514

Income from operations
Learning & Talent Management	$	7,514		$	6,108		$	14,330		$	10,865
Research		909			916			1,209			1,195
Unallocated		(4,317	)		(2,983	)		(8,261	)		(5,678	)

Total income from operations	$	4,106		$	4,041		$	7,278		$	6,382

Business Segment Information Based on Assets


Segment assets *	June 30, 2013		December 31, 2012
Learning & Talent Management	$	48,758	$	46,693
Research		27,113		23,978
Unallocated		110,015		103,857

Total assets	$	185,886	$	174,528

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Income tax provision	$ 1,712	$ 1,640	$ 2,991	$ 2,580
Effective tax rate			40.70%	40.10%

Stock Based Compensation - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2013 Incentive_Plan $ / shares shares	Jun. 30, 2012 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of incentive plans \| Incentive_Plan	2
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share units issued \| shares	77,750	69,950
Weighted average grant date fair value, restricted share unit \| $ / shares	$ 21.70	$ 23.00

Stock Based Compensation - Stock Based Compensation Expense Recorded in Condensed Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock based compensation expense	$ 400	$ 299	$ 710	$ 541
Cost of Revenues (Excluding Depreciation and Amortization) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock based compensation expense	22	11	39	21
Product Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock based compensation expense	46	36	79	71
Sales and Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock based compensation expense	43	40	79	77
Other General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock based compensation expense	$ 289	$ 212	$ 513	$ 372

Earnings Per Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Total number of common equivalent shares excluded from the calculations of diluted earnings per share	0.1	0.1	0.1	0.1

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net income	$ 2,422	$ 2,427	$ 4,362	$ 3,847
Denominator:
Weighted-average shares outstanding	26,722	26,127	26,531	26,063
Effect of dilutive shares	927	1,374	998	1,355
Weighted-average diluted shares	27,649	27,501	27,529	27,418
Basic earnings per share	$ 0.09	$ 0.09	$ 0.16	$ 0.15
Diluted earnings per share	$ 0.09	$ 0.09	$ 0.16	$ 0.14

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Marketable Securities - Fair Value of Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost	$ 46,812	$ 51,934
Available for sale securities, Unrealized Gains	11	35
Available for sale securities, Unrealized Losses	(46)	(17)
Available for sale securities, Fair Value	46,777	51,952
Level 1 [Member] \| Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost	5,059	5,042
Available for sale securities, Unrealized Gains	10	30
Available for sale securities, Fair Value	5,069	5,072
Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost	41,753	46,892
Available for sale securities, Unrealized Gains	1	5
Available for sale securities, Unrealized Losses	(46)	(17)
Available for sale securities, Fair Value	41,708	46,880
Level 2 [Member] \| Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost	2,257	2,254
Available for sale securities, Fair Value	2,257	2,254
Level 2 [Member] \| Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost		3,122
Available for sale securities, Unrealized Gains		1
Available for sale securities, Fair Value		3,123
Level 2 [Member] \| Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost	39,496	27,017
Available for sale securities, Unrealized Gains	1	1
Available for sale securities, Unrealized Losses	(46)	(17)
Available for sale securities, Fair Value	$ 39,451	27,001
Level 2 [Member] \| U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Adjusted Cost		14,499
Available for sale securities, Unrealized Gains		3
Available for sale securities, Fair Value		$ 14,502

Business Segments - Business Segment Information Based on Net Revenues and Net Income from Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Total net revenue	$ 31,919	$ 25,841	$ 61,565	$ 49,514
Income from operations
Total income from operations	4,106	4,041	7,278	6,382
Operating Segments [Member] \| Learning & Talent Management [Member]
Revenues
Total net revenue	25,126	19,305	48,267	37,103
Income from operations
Total income from operations	7,514	6,108	14,330	10,865
Operating Segments [Member] \| Research [Member]
Revenues
Total net revenue	6,793	6,536	13,298	12,411
Income from operations
Total income from operations	909	916	1,209	1,195
Unallocated [Member] \| Unallocated [Member]
Income from operations
Total income from operations	$ (4,317)	$ (2,983)	$ (8,261)	$ (5,678)

Business Segments - Business Segment Information Based on Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total assets	$ 185,886	$ 174,528
Operating Segments [Member] \| Learning & Talent Management [Member]
Segment Reporting Information [Line Items]
Total assets	48,758	46,693
Operating Segments [Member] \| Research [Member]
Segment Reporting Information [Line Items]
Total assets	27,113	23,978
Unallocated [Member] \| Unallocated [Member]
Segment Reporting Information [Line Items]
Total assets	$ 110,015	$ 103,857

Collaborative Arrangement - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Payments associated with capitalized software development	$ 2,013	$ 1,996
Collaborative Arrangement [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Profits or losses received from collaborative arrangement	50.00%
Revenues related to collaborative arrangement	$ 1,200	800
Expenses related to collaborative arrangement	1,000	$ 900
Collaborative Arrangement [Member] \| SimVentures [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Payments associated with capitalized software development	$ 500