Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning Balance at Dec. 31, 2011	$ 59,297	$ 142	$ 90,711	$ (1,052)	$ (30,504)
Beginning Balance (in shares) at Dec. 31, 2011		14,165,000
Common stock issued pursuant to stock plans (in shares)		307,000
Common stock issued pursuant to stock plans	398	3	395
Common stock repurchased, shares		(273,000)
Common stock repurchased	(1,332)	(3)	(1,329)
Value of vested restricted stock withheld for tax liability	(339)		(339)
Stock-based compensation	1,459		1,459
Foreign currency translation, net of tax	347			347
Unrealized holding gain (loss) on investments, net of tax	(11)			(11)
Net income	6,099				6,099
Ending Balance at Dec. 31, 2012	65,918	142	90,897	(716)	(24,405)
Ending Balance (in shares) at Dec. 31, 2012		14,199,000
Common stock issued pursuant to stock plans (in shares)		421,000
Common stock issued pursuant to stock plans	1,582	4	1,578
Common stock repurchased, shares		(10,000)
Common stock repurchased	(58)		(58)
Common stock issued in connection with acquisition (in shares)		1,608,000
Common stock issued in connection with acquisition	14,524	16	14,508
Value of vested restricted stock withheld for tax liability	(476)		(476)
Stock-based compensation	1,614		1,614
Tax benefit (Reversal of tax benefit) related to stock-based awards	(155)		(155)
Foreign currency translation, net of tax	833			833
Unrealized holding gain (loss) on investments, net of tax	1			1
Net income	13,418				13,418
Ending Balance at Dec. 31, 2013	97,201	162	107,908	118	(10,987)
Ending Balance (in shares) at Dec. 31, 2013		16,218,000
Common stock issued pursuant to stock plans (in shares)		363,000
Common stock issued pursuant to stock plans	2,101	4	2,097
Common stock repurchased, shares	(183,962)	(115,000)
Common stock repurchased	(1,070)	(1)	(1,069)
Value of vested restricted stock withheld for tax liability	(699)		(699)
Stock-based compensation	2,482		2,482
Tax benefit (Reversal of tax benefit) related to stock-based awards	761		761
Foreign currency translation, net of tax	(3,242)			(3,242)
Unrealized holding gain (loss) on investments, net of tax	(3)			(3)
Net income	9,930				9,930
Ending Balance at Dec. 31, 2014	$ 107,461	$ 165	$ 111,480	$ (3,127)	$ (1,057)
Ending Balance (in shares) at Dec. 31, 2014		16,466,000