CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income	Retained Earnings (Deficit)	Total
Balance at Dec. 31, 2011	$ 14	$ 108,061	$ (9,733)	$ 2,256	$ 10,228	$ 110,826
Balance (in shares) at Dec. 31, 2011	11,996,000
Increase (Decrease) in Stockholders' Equity
Stock option exercises and related income tax benefit		1,991	(45)			1,946
Stock option exercises and related income tax benefit (in shares)	183,000
Stock-based compensation expense		1,900				1,900
Purchases of common stock under a stock repurchase program			(3,910)			(3,910)
Purchases of common stock under a stock repurchase program (in shares)	(654,000)
Net income					5,094	5,094
Other comprehensive income (loss)				255		255
Balance at Dec. 31, 2012	14	111,952	(13,688)	2,511	15,322	116,111
Balance (in shares) at Dec. 31, 2012	11,525,000
Increase (Decrease) in Stockholders' Equity
Stock option exercises and related income tax benefit	1	2,332				2,333
Stock option exercises and related income tax benefit (in shares)	493,000
Stock-based compensation expense		1,517				1,517
Purchases of common stock under a stock repurchase program			(1,633)			(1,633)
Purchases of common stock under a stock repurchase program (in shares)	(227,000)
Net income					8,129	8,129
Other comprehensive income (loss)				(695)		(695)
Balance at Dec. 31, 2013	15	115,801	(15,321)	1,816	23,451	125,762
Balance (in shares) at Dec. 31, 2013	11,791,000					11,790,674
Increase (Decrease) in Stockholders' Equity
Stock option exercises and related income tax benefit	1	3,612				3,613
Stock option exercises and related income tax benefit (in 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 (in shares)	(229,000)					(228,771)
Net income					5,465	5,465
Other comprehensive income (loss)				(875)		(875)
Balance at Dec. 31, 2014	$ 16	$ 120,915	$ (17,472)	$ 941	$ 28,916	$ 133,316
Balance (in shares) at Dec. 31, 2014	12,268,000					12,267,550