CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning Balance at Mar. 31, 2009	$ 69,123,431	$ 307,417	$ 182,673,275		$ (113,857,261)
Beginning Balance (in shares) at Mar. 31, 2009		30,741,707
Net loss	(4,063,844)				(4,063,844)
Share-based compensation expense	1,006,798		1,006,798
Exercise of stock options (in shares)		20,100
Exercise of stock options	53,991	201	53,790
Ending Balance at Mar. 31, 2010	66,120,376	307,618	183,733,863		(117,921,105)
Ending Balance (in shares) at Mar. 31, 2010		30,761,807
Net loss	(43,509)				(43,509)
Share-based compensation expense	1,003,266		1,003,266
Exercise of stock options (in shares)		50,450
Exercise of stock options	6,571	505	6,066
Ending Balance at Mar. 31, 2011	67,086,704	308,123	184,743,195		(117,964,614)
Ending Balance (in shares) at Mar. 31, 2011		30,812,257
Net loss	(1,612,625)				(1,612,625)
Unrealized gain on investments	6,338			6,338
Foreign currency translation adjustment	107,289			107,289
Comprehensive loss	(1,498,998)
Share-based compensation expense	730,136		730,136
Repurchase and retirement of treasury stock (in shares)		(100,000)
Repurchase and retirement of treasury stock	(330,867)	(1,000)	(600,492)		270,625
Exercise of stock options (in shares)		2,500
Exercise of stock options	25	25
Ending Balance at Dec. 31, 2011	$ 65,987,000	$ 307,148	$ 184,872,839	$ 113,627	$ (119,306,614)
Ending Balance (in shares) at Dec. 31, 2011		30,714,757