Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Retained Earnings (Loss) [Member]	Total
Balance at Dec. 31, 2013	$ 15	$ 115,801	$ (15,321)	$ 1,816	$ 23,451	$ 125,762
Balance, shares at Dec. 31, 2013	11,791,000
Stock option exercises, RSUs vested and related income tax benefit	$ 1	3,612				3,613
Stock option exercises, RSUs vested and related income tax benefit, shares	706,000
Stock-based compensation expense		1,502				1,502
Purchases of common stock under a stock repurchase program			(2,151)			(2,151)
Purchases of common stock under a stock repurchase program, shares	(229,000)
Net income (loss)					5,465	5,465
Other comprehensive loss				(875)		(875)
Balance at Dec. 31, 2014	$ 16	120,915	(17,472)	941	28,916	133,316
Balance, shares at Dec. 31, 2014	12,268,000
Stock option exercises, RSUs vested and related income tax benefit		428				428
Stock option exercises, RSUs vested and related income tax benefit, shares	249,000
Stock-based compensation expense		1,589				1,589
Purchases of common stock under a stock repurchase program			(5,854)			(5,854)
Purchases of common stock under a stock repurchase program, shares	(602,000)
Net income (loss)					(18,258)	(18,258)
Other comprehensive loss				(1,706)		(1,706)
Balance at Dec. 31, 2015	$ 16	122,932	(23,326)	(765)	10,658	$ 109,515
Balance, shares at Dec. 31, 2015	11,915,000					11,914,946
Stock option exercises, RSUs vested and related income tax benefit		2,884				$ 2,884
Stock option exercises, RSUs vested and related income tax benefit, shares	458,000
Stock-based compensation expense		1,961				1,961
Purchases of common stock under a stock repurchase program			(3,608)			(3,608)
Purchases of common stock under a stock repurchase program, shares	(406,000)
Net income (loss)					17,593	17,593
Other comprehensive loss				126		126
Balance at Dec. 31, 2016	$ 16	$ 127,777	$ (26,934)	$ (639)	$ (28,251)	$ 128,471
Balance, shares at Dec. 31, 2016	11,967,000					11,967,202