QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
Total revenues	$ 5,988,072	$ 7,587,374	$ 4,114,814	$ 6,325,167	$ 4,254,876	$ 3,746,461	$ 3,266,405	$ 6,601,099	$ 24,015,427	$ 17,868,841	$ 24,255,485
Gross product margin	1,435,896	2,067,934	689,099	2,208,212	725,428	707,733	347,972	2,481,468
Net loss	$ (1,998,432)	$ (584,661)	$ (2,173,093)	$ (1,615,574)	$ (2,557,757)	$ (2,138,218)	$ (8,347,482)	$ (303,590)
Basic loss per share (in dollars per share)	$ (0.16)	$ (0.05)	$ (0.18)	$ (0.13)	$ (0.21)	$ (0.19)	$ (0.86)	$ (0.03)	$ (0.52)	$ (1.26)	$ (0.25)
Diluted loss per share (in dollars per share)	$ (0.16)	$ (0.05)	$ (0.18)	$ (0.13)	$ (0.21)	$ (0.19)	$ (0.86)	$ (0.03)	$ (0.52)	$ (1.26)	$ (0.25)