Consolidated Statement Of Shareholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2008	$ 291	$ 124,744	$ (21,031)	$ (80)	$ (5,556)	$ 98,368
Balance, shares at Dec. 31, 2008	29,102				955
Net income			8,679			8,679
Other comprehensive income				42		42
Comprehensive income						8,721
Equity compensation	2	2,677				2,679
Equity compensation, shares	160
Exercise of options	1	678			(330)	349
Exercise of options, shares	134				45
Employee stock purchase plan	1	413				414
Employee stock purchase plan, shares	79
Excess tax benefit (shortfall)		(85)				(85)
Balance at Dec. 31, 2009	295	128,427	(12,352)	(38)	(5,886)	110,446
Balance, shares at Dec. 31, 2009	29,475				1,000
Net income			3,944			3,944
Other comprehensive income				6		6
Comprehensive income						3,950
Equity compensation	2	2,918			(117)	2,803
Equity compensation, shares	219				18
Exercise of options		18				18
Exercise of options, shares	4
Employee stock purchase plan	1	220				221
Employee stock purchase plan, shares	43
Excess tax benefit (shortfall)		1,275				1,275
Repurchase of common stock					(5,760)	(5,760)
Repurchase of common stock, shares					(1,031)
Stock issued for SMI transaction	2	987				989
Stock issued for SMI transaction, shares	209
Balance at Dec. 31, 2010	300	133,845	(8,408)	(32)	(11,763)	113,942
Balance, shares at Dec. 31, 2010	29,950				2,049
Net income			7,371			7,371
Other comprehensive income				26		26
Comprehensive income						7,397
Equity compensation		937			2,077	3,014
Equity compensation, shares	31				360
Exercise of options	1	380			27	408
Exercise of options, shares	84				37
Employee stock purchase plan		286				286
Employee stock purchase plan, shares	64
Excess tax benefit (shortfall)		(445)				(445)
Repurchase of common stock					(3,064)	(3,064)
Repurchase of common stock, shares					613
Balance at Dec. 31, 2011	$ 301	$ 135,003	$ (1,037)	$ (6)	$ (12,723)	$ 121,538
Balance, shares at Dec. 31, 2011	30,067				2,265