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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 |  |  |

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