Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net revenue	$ 24,861	$ 16,427
Expenses:
Cost of product revenue	3,494	2,751
Research and development	7,478	5,538
Selling, general and administrative	27,602	22,359
Total operating expenses	38,574	30,648
Loss from operations	(13,713)	(14,221)
Other income and expenses:
Interest income	107	25
Interest expense	(4,479)	(4,307)
Other gains (losses), net	175	157
Net loss	(17,910)	(18,346)
Other comprehensive income (loss)
Unrealized gain (loss) on available-for-sale securities, net of tax	(171)	(4)
Comprehensive loss	$ (18,081)	$ (18,350)
Earnings per share, basic (in USD per share)	$ (0.35)	$ (0.39)
Earnings per share, diluted (in USD per share)	$ (0.35)	$ (0.39)
Weighted average common stock outstanding
Weighted average number of shares outstanding, basic	52,149,538	46,664,374
Weighted average number of shares outstanding, diluted	52,149,538	46,664,374
Product revenue, net
Net revenue	$ 19,918	$ 13,207
Government Contract Service Revenue
Net revenue	2,172	973
Government Contract Grant Revenue
Net revenue	2,099	1,613
Collaboration and royalty revenue
Net revenue	$ 672	$ 634