CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Cash flows from operating activities
Net loss	$ (14,158)	$ (17,410)	$ (15,872)	$ (12,242)	$ (50,081)	$ (42,095)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation					17,180	12,528
Depreciation and amortization					2,450	1,436
Accounts receivable credit losses					50	0	$ 14
Accretion of discount on marketable securities					625	1,056
Amortization of debt issuance costs					152	234
Loss on extinguishment of debt					0	1,848
Loss on sale and disposal of property and equipment					133	304
Changes in operating assets and liabilities:
Accounts receivable					(2,001)	1,060
Inventory					(5,178)	(4,545)
Prepaid expenses and other assets					1,401	610
Accounts payable					1,476	425
Accrued liabilities and other					(1,087)	320
Net cash used in operating activities					(34,880)	(26,819)
Cash flows from investing activities
Maturities of marketable securities					90,200	107,494
Purchases of marketable securities					(85,257)	(66,678)
Purchases of property and equipment					(7,847)	(4,614)
Net cash provided by (used in) investing activities					(2,904)	36,202
Cash flows from financing activities
Proceeds from debt financing					0	35,000
Repayments of debt financing					0	(41,000)
Payments of debt issuance costs					0	(111)
Payments of prepayment penalty and lender fees					0	(508)
Proceeds from issuance of common stock under employee stock purchase plan					1,199	1,566
Proceeds from the exercise of stock options					305	2,327
Net cash provided by (used in) financing activities					1,504	(2,726)
Effect of exchange rate changes on cash and cash equivalents					(840)	(375)
Net increase (decrease) in cash and cash equivalents					(37,120)	6,282
Cash and cash equivalents at
Beginning of period		$ 63,419		$ 53,581	63,419	53,581	53,581
End of period	$ 26,299		$ 59,863		26,299	59,863	$ 63,419
Supplemental disclosure of non-cash information
Vesting of early exercised stock options					0	27
Unpaid purchases of property and equipment					$ 593	$ 474