CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
REVENUES:
TOTAL REVENUES	$ 34,464,032	$ 34,581,440
COSTS AND EXPENSES:
Cost of product sales	22,394,317	22,599,432
Research and development expenses	8,538,416	8,526,256
Selling, general and administrative expenses	16,138,424	11,100,775
Acquisition costs	721,465	337,645
TOTAL COSTS AND EXPENSES	47,792,622	42,564,108
LOSS FROM OPERATIONS	(13,328,590)	(7,982,668)
OTHER (EXPENSE) INCOME:
Interest (expense) income, net	(846,831)	49,498
LOSS BEFORE INCOME TAX BENEFIT	(14,175,421)	(7,933,170)
Income tax benefit	(500,292)	(67,521)
NET LOSS	$ (13,675,129)	$ (7,865,649)
Basic loss per share (in dollars per share)	$ (0.81)	$ (0.54)
Diluted loss per share (in dollars per share)	$ (0.81)	$ (0.54)
Weighted average number of shares outstanding, basic (in shares)	16,954,142	14,432,505
Weighted average number of shares outstanding, diluted (in shares)	16,954,142	14,432,505
Net Product Sales [Member]
REVENUES:
TOTAL REVENUES	$ 28,844,997	$ 27,913,209
R&D and Grant Revenue [Member]
REVENUES:
TOTAL REVENUES	4,680,282	5,719,458
License and Royalty Revenue [Member]
REVENUES:
TOTAL REVENUES	$ 938,753	$ 948,773