CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities
Net loss	$ (15,641)	$ (12,284)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	635	865
Stock-based compensation	5,669	6,426
Non-cash operating lease cost	471	396
Changes in valuation of warrant investment		281
Net gain on sale of available-for-sale securities	3	26
Unrealized gain on investments	(53)	(820)
Impairment of long-lived assets		542
Non-cash interest expense	118	166
Foreign currency remeasurement (gain) loss	(767)	287
Changes in operating assets and liabilities:
Accounts receivable	9,157	(564)
Inventories	(5,996)	(834)
Prepaid and other assets	(1,435)	(4,111)
Accounts payable	4,831	(4,121)
Accrued liabilities and other non-current liabilities	(6,596)	(8,296)
Deferred product revenue	1,104	585
Net cash used in operating activities	(8,500)	(21,456)
Investing activities
Capital expenditures	(1,524)	(113)
Purchases of investments	(562)	(642)
Proceeds from maturities and sale of investments	440	9,377
Net cash (used in) provided by investing activities	(1,646)	8,622
Financing activities
Net proceeds from equity incentives	492	2,135
Net costs from public offerings	(72)
Net proceeds on revolving line of credit	3,091	314
Repayment of loans	(1,450)
Net cash provided by financing activities	2,061	2,449
Effect of exchange rates on cash, cash equivalents, and restricted cash	116	(284)
Net decrease in cash, cash equivalents, and restricted cash	(7,969)	(10,669)
Cash, cash equivalents and restricted cash, beginning of period	37,358	51,044
Cash, cash equivalents and restricted cash, end of period	$ 29,389	$ 40,375