Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues	$ 12,270,000	$ 11,122,000
Costs and expenses:
Manufacture and supply	4,214,000	2,757,000
Research and development	4,773,000	3,659,000
Selling, general and administrative	13,021,000	13,231,000
Total costs and expenses	22,008,000	19,647,000
Loss from operations	(9,738,000)	(8,525,000)
Other expenses:
Interest expense	(1,618,000)	(2,761,000)
Interest expense related to the sale of future revenue, net	(1,861,000)	(3,334,000)
Interest and other expense, net	(3,000)	(52,000)
Net loss before income taxes	(13,220,000)	(14,672,000)
Income taxes	0	0
Net loss	(13,220,000)	(14,672,000)
Comprehensive loss	$ (13,220,000)	$ (14,672,000)
Net loss per share - basic (in dollars per share)	$ (0.32)	$ (0.41)
Net loss per share - diluted (in dollars per share)	$ (0.32)	$ (0.41)
Weighted-average number of common shares outstanding - basic (in shares)	41,465,798	35,563,275
Weighted-average number of common shares outstanding - diluted (in shares)	41,465,798	35,563,275