CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Product revenues, net	$ 1,372	$ 3,266
Costs and expenses:
Cost of product revenues	775	755
Selling, general and administrative	26,982	27,699
Research and development	4,466	3,126
Loss on fair value remeasurement of deferred purchase consideration	1,051
Gain on fair value remeasurement of contingent consideration	(988)
Total costs and expenses	32,286	31,580
Loss from operations	(30,914)	(28,314)
Other income (expense):
Interest and other income	8	43
Interest and other expense	(2,035)	(2,141)
Total interest and other expense	(2,027)	(2,098)
Net loss	$ (32,941)	$ (30,412)
Net loss per share-basic (in dollar per share)	$ (0.45)	$ (0.49)
Net loss per share- diluted (in dollar per share)	$ (0.45)	$ (0.49)
Weighted average shares outstanding-basic (in shares)	73,640,830	61,655,867
Weighted average shares outstanding-diluted (in shares)	73,640,830	61,655,867
Statement of Comprehensive Loss
Net loss	$ (32,941)	$ (30,412)
Other comprehensive loss:
Change in unrealized gains on investments	(2)	(1)
Total other comprehensive loss	(2)	(1)
Total comprehensive loss	$ (32,943)	$ (30,413)