CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Total revenues	$ 36,939	$ 34,437
Operating expenses:
Cost of sales, excluding amortization of acquired intangible assets	8,177	5,824
Research and development	28,500	17,424
Sales and marketing	27,503	25,293
General and administrative	25,575	20,726
Amortization of acquired intangible assets	2,460	2,460
Total operating expenses	92,215	71,727
Loss from operations	(55,276)	(37,290)
Other income (expense):
Interest and other income, net	292	58
Interest expense	(5,498)	(7,257)
Gain (loss) on extinguishment of debt	2,065	(905)
Total other expense, net	(3,141)	(8,104)
Net loss	$ (58,417)	$ (45,394)
Net loss per share:
Basic and diluted	$ (2.03)	$ (3.54)
Weighted average common shares outstanding:
Basic and diluted	28,758	12,836
Net loss	$ (58,417)	$ (45,394)
Other comprehensive income (loss):
Foreign currency translation adjustments		1
Other comprehensive income (loss)		1
Comprehensive loss	(58,417)	(45,393)
Product [Member]
Revenues:
Total revenues	35,312	20,831
License and Collaboration Agreement [Member]
Revenues:
Total revenues	756	11,942
Royalty Income [Member]
Revenues:
Total revenues	$ 871	$ 1,664