Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net loss	$ (42,732)	$ (42,396)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	2,040	1,465
Stock-based compensation expense	29,284	17,478
Accretion of discounts on investments, net	(5,280)	(338)
Amortization of debt discount and debt issuance costs	173	160
Amortization of right-of-use asset	821	766
Non-cash interest expense	600	823
Loss on extinguishment of debt		245
Loss on disposal of property and equipment	144	175
Change in accounts receivable allowances	45	(3)
Provision for excess and obsolete inventories	23	5
Changes in assets and liabilities:
Accounts receivable	(3,816)	(5,184)
Inventories	(2,796)	(2,446)
Prepaid expenses and other current assets	(353)	(1,132)
Other assets	(253)	(52)
Accounts payable	2,477	1,665
Accrued liabilities	(2,808)	(744)
Other liabilities	(1,130)	(344)
Net cash used in operating activities	(23,561)	(29,857)
Cash flows from investing activities
Purchases of property and equipment	(1,054)	(3,438)
Purchases of investments	(148,842)	(53,679)
Proceeds from maturity of investments	144,300
Net cash used in investing activities	(5,596)	(57,117)
Cash flows from financing activities
Proceeds from issuance of common stock	2,832	3,067
Proceeds from long-term debt		75,000
Principal repayment of debt		(49,000)
Payments of debt issuance costs		(1,086)
Payments of deferred offering costs		(9)
Net cash provided by financing activities	2,832	27,972
Net change in cash, cash equivalents and restricted cash	(26,325)	(59,002)
Cash, cash equivalents and restricted cash, beginning of period	55,513	110,463
Cash, cash equivalents and restricted cash, end of period	29,188	51,461
Supplemental disclosure of cash flow information
Cash paid for interest	4,364	2,383
Noncash investing and financing activities:
Accounts payable and accrued liabilities for purchases of property and equipment	71	176
Right-of-use asset obtained in exchange for lease obligation	$ 2,504	903
Unpaid debt issuance costs		3
Unpaid deferred offering costs		$ 162