Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Deferred Stock-based Compensation [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]
Balance at Dec. 31, 2012	$ 60,031	$ 18	$ 109,485	$ 2,406	$ (54,672)	$ 2,794
Balance, shares at Dec. 31, 2012		17,265
Deferred stock-based compensation	1,917			1,917
Issuance of stock on exercise of options and RSUs	3,913		$ 5,239	$ (1,326)
Issuance of stock on exercise of options and RSUs, shares		1,210
Issuance of stock purchased through ESPP	521		$ 521
Issuance of stock purchased through ESPP, shares		92
Issuance of cash dividends	(2,761)				$ (2,761)
Repurchase of common stock	(873)		$ (873)
Repurchase of common stock, shares		(159)
Net income	18,808				$ 18,808
Other comprehensive loss	(382)					$ (382)
Balance at Dec. 31, 2013	81,174	$ 18	$ 114,372	$ 2,997	$ (38,625)	$ 2,412
Balance, shares at Dec. 31, 2013		18,408
Deferred stock-based compensation	2,160			2,160
Issuance of stock on exercise of options and RSUs	1,108		$ 2,491	$ (1,383)
Issuance of stock on exercise of options and RSUs, shares		224
Issuance of stock purchased through ESPP	661		$ 661
Issuance of stock purchased through ESPP, shares		51
Issuance of cash dividends	(2,700)				$ (2,700)
Repurchase of common stock	(9,676)		$ (9,676)
Repurchase of common stock, shares		(740)
Net income	14,508				$ 14,508
Other comprehensive loss	(975)					$ (975)
Balance at Dec. 31, 2014	86,260	$ 18	$ 107,848	$ 3,774	$ (26,817)	$ 1,437
Balance, shares at Dec. 31, 2014		17,943
Deferred stock-based compensation	2,936			2,936
Issuance of stock on exercise of options and RSUs	1,401		$ 4,293	$ (2,892)
Issuance of stock on exercise of options and RSUs, shares		295
Issuance of stock purchased through ESPP	673		673
Issuance of stock purchased through ESPP, shares		60
Repurchase of common stock	(40,172)	$ (2)	$ (40,170)
Repurchase of common stock, shares		(2,511)
Net income	13,038				$ 13,038
Other comprehensive loss	(1,266)					$ (1,266)
Balance at Dec. 31, 2015	$ 62,870	$ 16	$ 72,644	$ 3,818	$ (13,779)	$ 171
Balance, shares at Dec. 31, 2015		15,787