CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net loss	$ (29,200)	$ (45,255)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,335	2,336
Stock-based compensation	17,201	17,033
Non-cash operating lease cost	1,028	1,061
Changes in valuation of warrant investment	245	(485)
Net loss (gain) on sale of available-for-sale securities	102	(28)
Unrealized gain on investments	(484)	(242)
Impairment of long-lived assets	542
Non-cash interest expense	1,440	780
Foreign currency remeasurement loss	540	386
Changes in operating assets and liabilities:
Accounts receivable	(3,168)	(1,688)
Inventories	(2,519)	(12,130)
Prepaid and other assets	1,509	2,009
Accounts payable	(5,370)	2,497
Accrued liabilities and other non-current liabilities	(8,141)	859
Deferred product revenue	81	167
Net cash used in operating activities	(23,859)	(32,700)
Investing activities
Capital expenditures	(765)	(446)
Purchases of investments	(22,657)	(2,132)
Proceeds from maturities and sale of investments	24,503	55,556
Net cash provided by investing activities	1,081	52,978
Financing activities
Net proceeds from equity incentives	3,594	5,085
Offering costs from public offerings	(42)	(359)
Net proceeds on revolving line of credit	183	1,470
Proceeds from loans		15,000
Contribution from noncontrolling interest		1,000
Net cash provided by financing activities	3,735	22,196
Effect of exchange rates on cash, cash equivalents, and restricted cash	(1,128)	(639)
Net (decrease) increase in cash, cash equivalents and restricted cash	(20,171)	41,835
Cash, cash equivalents and restricted cash, beginning of period	51,044	38,903
Cash, cash equivalents and restricted cash, end of period	$ 30,873	$ 80,738