Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total revenue	$ 29,552,000	$ 27,209,000
Costs of goods sold:
Total costs of goods sold and services	14,993,000	10,860,000
Gross profit	14,559,000	16,349,000
Operating expenses:
Research and development	7,034,000	6,683,000
Selling, general and administrative	25,712,000	19,455,000
Total operating expenses	32,746,000	26,138,000
Loss from operations	(18,187,000)	(9,789,000)
Interest income (expense), net	52,000	(163,000)
Other expense, net	(217,000)	(194,000)
Loss before income taxes	(18,352,000)	(10,146,000)
Income tax benefit	199,000	42,000
Net loss	$ (18,153,000)	$ (10,104,000)
Net loss per share, basic (in dollars per share)	$ (0.49)	$ (0.29)
Net loss per share, diluted (in dollars per share)	$ (0.49)	$ (0.29)
Weighted-average common shares outstanding, basic (in shares)	36,850,894	34,434,931
Weighted-average common shares outstanding, diluted (in shares)	36,850,894	34,434,931
Product revenue
Total revenue	$ 20,656,000	$ 18,248,000
Costs of goods sold:
Total costs of goods sold and services	10,746,000	7,480,000
Service and other revenue
Total revenue	8,810,000	6,409,000
Costs of goods sold:
Total costs of goods sold and services	4,247,000	3,380,000
Collaboration and license revenue
Total revenue	86,000	261,000
Grant revenue
Total revenue	$ 0	$ 2,291,000