CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Total revenues	$ 9,294	$ 7,323
Operating expenses:
Cost of sales, excluding amortization of acquired intangible assets	1,777	1,390
Research and development	9,945	5,479
Sales and marketing	6,693	5,659
General and administrative	8,548	5,115
Amortization of acquired intangible assets	615	615
Total operating expenses	27,578	18,258
Loss from operations	(18,284)	(10,935)
Other income (expense):
Interest and other income, net	61	1
Interest expense	(1,194)	(1,346)
Loss on extinguishment of debt	(1,559)	0
Total other expense, net	(2,692)	(1,345)
Net loss	$ (20,976)	$ (12,280)
Net loss per share - basic and diluted	$ (0.56)	$ (0.50)
Weighted average shares outstanding - basic and diluted	37,253	24,735
Net loss	$ (20,976)	$ (12,280)
Other comprehensive loss:
Unrealized loss on available-for-sale securities, net of tax of $0 for periods presented	(53)	0
Comprehensive loss	(21,029)	(12,280)
Product [Member]
Revenues:
Total revenues	9,010	6,802
License and Collaboration Agreements [Member]
Revenues:
Total revenues	59	341
Royalty Income [Member]
Revenues:
Total revenues	$ 225	$ 180