CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (2,636)	$ (10,562)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	1,287	507
Stock-based compensation expense	3,921	2,310
Non-cash interest expense and end of term accretion expense	106	137
Non-cash lease expense	191	178
Net amortization of premiums on marketable securities		228
Unrealized foreign currency transaction (gains) losses	(137)	214
Changes in operating assets and liabilities:
Accounts receivable	(10,962)	(5,804)
Inventory	(3,623)	(2,926)
Prepaid expenses and other current assets	(884)	88
Other non-current assets	(54)
Accounts payable	1,028	(4,013)
Accrued expenses and other current liabilities	3,454	(4)
Operating lease liabilities	(352)	1,241
Net cash used in operating activities	(8,661)	(18,406)
Cash flows from investing activities:
Purchases of property and equipment	(927)	(1,953)
Purchases of marketable securities		(2,033)
Proceeds from sales and maturities of marketable securities		14,500
Net cash provided by (used in) investing activities	(927)	10,514
Cash flows from financing activities:
Proceeds from issuance of common stock upon exercise of stock options	3,574	202
Proceeds from issuance of common stock in connection with employee stock purchase plan	384	203
Net cash provided by financing activities	3,958	405
Effect of exchange rate changes on cash, cash equivalents and restricted cash	73	(196)
Net decrease in cash, cash equivalents and restricted cash	(5,557)	(7,683)
Cash, cash equivalents and restricted cash, beginning of period	201,682	26,080
Cash, cash equivalents and restricted cash, end of period	196,125	18,397
Supplemental disclosure of non-cash investing and financing activities:
Transfers of inventory to property and equipment	317	1,030
Purchases of property and equipment included in accounts payable and accrued expenses	30	939
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	195,375	17,897
Restricted cash	750	500
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 196,125	$ 18,397