CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net loss	$ (43,336)	$ (61,256)
Adjustments to reconcile net loss to net cash used in operating activities
Stock-based compensation	24,057	23,061
Depreciation and amortization	5,428	3,452
Accounts receivable credit losses	761	150
Inventory reserve	1,709	319
Accretion (amortization) of discount and premium on marketable securities	(4,009)	229
Amortization of debt issuance costs	208	198
Loss on disposal of property and equipment	1,302	153
Changes in operating assets and liabilities
Accounts receivable	(2,122)	(6,479)
Inventory	(4,719)	(6,028)
Prepaid expenses and other assets	(762)	810
Accounts payable	(1,118)	2,529
Accrued liabilities and other	3,888	1,207
Net cash used in operating activities	(18,713)	(41,655)
Cash flows from investing activities
Maturities of marketable securities	137,500	126,200
Purchases of marketable securities	(189,499)	(119,508)
Purchases of property and equipment	(7,799)	(9,507)
Net cash used in investing activities	(59,798)	(2,815)
Cash flows from financing activities
Proceeds from public offering, net of discounts, commissions and offering costs	83,671	0
Proceeds from debt financing	36,000	0
Repayments of debt financing	(35,275)	0
Payments of debt issuance costs	(40)	0
Proceeds from the exercise of common stock options	4,386	379
Proceeds from issuance of common stock under employee stock purchase plan	2,191	1,818
Net cash provided by financing activities	90,933	2,197
Effect of exchange rate changes on cash and cash equivalents	132	(429)
Net increase (decrease) in cash and cash equivalents	12,554	(42,702)
Cash and cash equivalents at
Beginning of year	20,717	63,419
End of year	33,271	20,717
Supplemental disclosure of cash flow information
Cash paid for interest	3,263	2,621
Supplemental disclosure of non-cash information
Unpaid purchases of property and equipment	$ 501	$ 1,115