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SELECTED QUARTERLY FINANCIAL DATA (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]                      
Revenues $ 5,630,000 $ 5,190,000 $ 4,848,000 $ 4,475,000 $ 4,257,000 $ 4,186,000 $ 3,752,000 $ 2,831,000 $ 20,142,898 $ 15,026,219 $ 8,775,598
Gross profit 4,395,000 3,996,000 3,815,000 3,431,000 3,377,000 3,118,000 2,859,000 2,000,000 15,636,225 11,354,416 6,816,001
Net loss $ (17,843,000) $ (19,472,000) $ (27,227,000) $ (20,895,000) $ (16,303,000) $ (17,832,000) $ (10,899,000) $ (9,183,000) $ (85,077,024) $ (54,217,210) $ (28,419,313)
Loss per common share, basic and diluted (in dollars per shares) $ (.10) $ (.11) $ (.16) $ (.13) $ (0.10) $ (0.12) $ (0.07) $ (0.06) $ (0.49) $ (0.36) $ (0.22)