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Shareholders Equity (Unaudited) - USD ($)
Common Stock
Additional Paid-In Capital
Retained Earnings / Accumulated Deficit
Total
Beginning Balance at Dec. 31, 2017 $ 7,011 $ 64,777,620 $ (47,554,208) $ 17,230,423
Beginning Balance (in shares) at Dec. 31, 2017 7,011,128      
Exercise of stock options $ 118 275,027   275,145
Exercise of stock options (in shares) 117,852      
Cost of tender offer $ (1,250) (5,018,498)   (5,019,748)
Cost of tender offer (in shares) (1,250,000)      
Stock-based compensation   112,133   112,133
Net gain (loss)     (225,029) (225,029)
Ending Balance at Mar. 31, 2018 $ 5,879 60,146,282 (47,779,237) 12,372,924
Ending Balance (in shares) at Mar. 31, 2018 5,878,980      
Beginning Balance at Dec. 31, 2018 $ 5,883 $ 60,523,901 (48,125,349) $ 12,404,435
Beginning Balance (in shares) at Dec. 31, 2018 5,883,109      
Restricted stock grants 116 (116)   116,050
Restricted stock grants (in shares) $ 116,050      
Stock-based compensation   $ 121,965   $ 121,965
Net gain (loss)     11,839 11,839
Ending Balance at Mar. 31, 2019 $ 5,999 $ 60,645,750 $ (48,113,510) $ 12,538,239
Ending Balance (in shares) at Mar. 31, 2019 5,999,159