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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
BALANCE at Dec. 31, 2012 $ 17,678,435 $ 27,724 $ 100,882,019 $ (83,231,308)
BALANCE (in shares) at Dec. 31, 2012   27,724,267    
Stock option compensation 10,059 0 10,059 0
Stock option compensation (in shares)   0    
Stock option exercises 70,472 153 70,319 0
Stock option exercises (in shares) 153,200 153,200    
Issuance of common stock 12,600 20 12,580 0
Issuance of common stock (in shares)   20,000    
Net loss (1,839,604) 0 0 (1,839,604)
BALANCE at Jun. 30, 2013 $ 15,931,962 $ 27,897 $ 100,974,977 $ (85,070,912)
BALANCE (in shares) at Jun. 30, 2013   27,897,467