Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning balance at Dec. 31, 2008	$ 112,526,262	$ 638	$ 87,663,129	$ (14,708,237)	$ 0	$ 39,570,732
Beginning balance, shares at Dec. 31, 2008		61,795,712		2,091,600
Exercise of stock options, shares		323,351
Exercise of stock options	155,544	4	155,540
Stock-based compensation	4,988,837		4,988,837
Tax benefit of stock options exercised	31,659		31,659
Net loss	(1,106)					(1,106)
Ending balance at Dec. 31, 2009	117,701,196	642	92,839,165	(14,708,237)	0	39,569,626
Ending balance, shares at Dec. 31, 2009		62,119,063		2,091,600
Exercise of stock options, shares		502,205
Exercise of stock options	1,001,476	5	1,001,471
Stock-based compensation	3,682,675		3,682,675
Tax benefit of stock options exercised	52,147		52,147
Reversal of tax benefit from stock options forfeited	(329,143)		(329,143)
Stock option buyback	(124,230)		(124,230)
Net loss	(4,384,435)					(4,384,435)
Foreign currency translation adjustments	(35,445)				(35,445)
Ending balance at Dec. 31, 2010	117,564,241	647	97,122,085	(14,708,237)	(35,445)	35,185,191
Ending balance, shares at Dec. 31, 2010		62,621,268		2,091,600
Exercise of stock options, shares		539,923
Exercise of stock options	1,427,418	5	1,427,413
Stock-based compensation	3,038,300		3,038,300
Tax benefit of stock options exercised	9,828		9,828
Purchase of treasury stock, shares		(7,464,583)		7,464,583
Purchase of treasury stock	(32,498,856)			(32,498,856)
Net loss	(7,039,866)					(7,039,866)
Foreign currency translation adjustments	(45,511)				(45,511)
Ending balance at Dec. 31, 2011	$ 82,455,554	$ 652	$ 101,597,626	$ (47,207,093)	$ (80,956)	$ 28,145,325
Ending balance, shares at Dec. 31, 2011		55,696,608		9,556,183