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Unaudited Condensed Consolidated Statements of Shareholders' Equity - USD ($)
Sale at the Market [Member]
Common Stock [Member]
Sale at the Market [Member]
Additional Paid-in Capital [Member]
Sale at the Market [Member]
Retained Earnings [Member]
Sale at the Market [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance at Mar. 31, 2016         $ 245,873 $ 278,896,573 $ (187,292,463) $ 91,849,983
Balance (in shares) at Dec. 31, 2015         8,195,760      
Balance at Dec. 31, 2015         $ 245,873 278,833,156 (184,030,436) 95,048,593
Net loss attributable to common shareholders             (3,262,027) (3,262,027)
Share based compensation         68,417 68,417
Offering expenses         (5,000) (5,000)
Balance (in shares) at Mar. 31, 2016         8,195,760      
Balance at Mar. 31, 2017         $ 335,343 284,238,635 (232,604,820) 51,969,158
Balance (in shares) at Dec. 31, 2016         10,876,112      
Balance at Dec. 31, 2016         $ 326,283 283,757,739 (229,977,258) 54,106,764
Net loss attributable to common shareholders             (2,627,562) (2,627,562)
Share based compensation         $ 40,461 $ 40,461
Issuance of shares sold at the market (ATM), net of issuance costs (in shares) 301,780              
Issuance of shares sold at the market (ATM), net of issuance costs $ 9,060 $ 440,435 $ 449,495        
Balance (in shares) at Mar. 31, 2017         11,177,892