Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (Loss) (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated (Deficit) [Member]	Total
Balance at Dec. 31, 2008	$ 10	$ 81,824		$ (5,270)	$ (56,622)	$ 19,942
Balance, shares at Dec. 31, 2008	9,753,392
Stock option exercises		743				743
Stock option exercises, shares	141,804
Common Stock issued pursuant to the Employee Stock Purchase Plan		68				68
Common Stock issued pursuant to the Employee Stock Purchase Plan, shares	35,486
Stock-based compensation expense		864				864
Comprehensive income (loss):
Net income					4,824	4,824
Foreign currency translation adjustment				2,028
Comprehensive income (loss)						6,852
Balance at Dec. 31, 2009	10	83,499		(3,242)	(51,798)	28,469
Balance, shares at Dec. 31, 2009	9,930,682
Stock option exercises	1	2,909				2,910
Stock option exercises, shares	662,795
Common Stock issued pursuant to the Employee Stock Purchase Plan		52				52
Common Stock issued pursuant to the Employee Stock Purchase Plan, shares	9,204
Stock-based compensation expense		943				943
Excess tax benefits from stock-based compensation		32				32
Restricted stock issuance, shares	48,750
Common stock cash dividends					(1,540)	(1,540)
Comprehensive income (loss):
Net income					5,353	5,353
Foreign currency translation adjustment				(462)
Comprehensive income (loss)						4,891
Balance at Dec. 31, 2010	11	87,435		(3,704)	(47,985)	35,757
Balance, shares at Dec. 31, 2010	10,651,431
Stock option exercises		1,964				1,964
Stock option exercises, shares	660,069
Common Stock issued pursuant to the Employee Stock Purchase Plan		33				33
Common Stock issued pursuant to the Employee Stock Purchase Plan, shares	5,334
Stock-based compensation expense		592				592
Excess tax benefits from stock-based compensation		38				38
Restricted stock cancellations net of issuance, shares	(2,341)
Treasury stock			(1,253)			(1,253)
Treasury stock, shares	(178,889)
Common stock cash dividends					(23,901)	(23,901)
Comprehensive income (loss):
Net income					32,309	32,309
Unrealized losses on investments, related party, net of tax				(284)
Foreign currency translation adjustment				(543)
Comprehensive income (loss)						35,088
Balance at Dec. 31, 2011	$ 11	$ 90,062	$ (1,253)	$ (4,531)	$ (39,577)	$ 44,712
Balance, shares at Dec. 31, 2011	11,135,604