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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Total
BALANCE at Dec. 31, 2010 $ 27,007 $ 100,438,969 $ (80,680,363) $ 19,785,613
BALANCE (in shares) at Dec. 31, 2010 27,006,547      
Stock based compensation expense (employees and directors) 0 3,991 0 3,991
Exercise of stock options 435 226,320 0 226,755
Exercise of stock options (in shares) 435,123     435,123
Issuance of restricted stock as consultant's compensation 20 29,876 0 29,896
Issuance of restricted stock as consultant's compensation (in shares) 20,834      
Net loss 0 0 (290,859) (290,859)
BALANCE at Dec. 31, 2011 27,462 100,699,156 (80,971,222) 19,755,396
BALANCE (in shares) at Dec. 31, 2011 27,462,504      
Stock based compensation expense (employees and directors) 0 52,677 0 52,677
Exercise of stock options 262 130,186 0 130,448
Exercise of stock options (in shares) 261,763     261,763
Net loss 0 0 (2,260,086) (2,260,086)
BALANCE at Dec. 31, 2012 $ 27,724 $ 100,882,019 $ (83,231,308) $ 17,678,435
BALANCE (in shares) at Dec. 31, 2012 27,724,267