CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
REVENUES:
TOTAL REVENUES	$ 33,409,251	$ 24,015,427
COSTS AND EXPENSES:
Cost of product sales	21,427,243	12,921,157
Research and development expenses	8,526,256	8,555,381
Selling, general and administrative expenses	11,100,775	8,963,363
Acquisition costs	337,645	58,076
TOTAL OPERATING EXPENSES	41,391,919	30,497,977
LOSS FROM OPERATIONS	(7,982,668)	(6,482,550)
OTHER INCOME (EXPENSE):
Interest income, net	49,498	22,485
LOSS BEFORE INCOME TAXES (BENEFIT) PROVISION	(7,933,170)	(6,460,065)
Income tax (benefit) provision	(67,521)	(88,305)
NET LOSS	$ (7,865,649)	$ (6,371,760)
Basic loss per share (in dollars per share)	$ (0.55)	$ (0.52)
Diluted loss per share (in dollars per share)	$ (0.55)	$ (0.52)
Weighted average number of shares outstanding, basic (in shares)	14,432,505	12,300,031
Weighted average number of shares outstanding, diluted (in shares)	14,432,505	12,300,031
Net Product Sales [Member]
REVENUES:
TOTAL REVENUES	$ 26,741,020	$ 19,322,302
License and Royalty Revenue [Member]
REVENUES:
TOTAL REVENUES	948,773	741,534
R&D and Grant Revenue [Member]
REVENUES:
TOTAL REVENUES	$ 5,719,458	$ 3,951,591