SELECTED QUARTERLY FINANCIAL DATA (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 4,487,000	$ 5,536,000	$ 4,403,000	$ 4,930,000	$ 5,630,000	$ 5,190,000	$ 4,848,000	$ 4,475,000	$ 19,356,450	$ 20,142,898	$ 15,026,219
Gross profit	3,778,000	4,298,000	3,273,000	3,822,000	4,395,000	3,996,000	3,815,000	3,431,000	15,170,742	15,636,225	11,354,416
Net loss	$ (22,836,000)	$ (25,016,000)	$ (21,094,000)	$ (20,929,000)	$ (17,483,000)	$ (19,472,000)	$ (27,227,000)	$ (20,895,000)	$ (89,875,459)	$ (85,077,024)	$ (54,217,210)
Loss per common share, basic and diluted (in dollars per shares)	$ (0.12)	$ (0.13)	$ (0.11)	$ (0.11)	$ (0.10)	$ (0.11)	$ (0.16)	$ (0.13)	$ (0.46)	$ (0.49)	$ (0.36)