Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net loss	$ (42,396)	$ (35,118)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	1,465	723
Stock-based compensation expense	17,478	10,628
Amortization of premiums (accretion of discounts) on investments, net	(338)	451
Amortization of debt discount and debt issuance costs	160	119
Amortization of right-of-use asset	766	627
Non-cash interest expense	823	193
Loss on extinguishment of debt	245
Loss on disposal of property and equipment	175
Change in provision for doubtful accounts receivable	(3)
Provision for excess and obsolete inventories	5	56
Changes in assets and liabilities:
Accounts receivable	(5,184)	(1,906)
Inventories	(2,446)	(3,744)
Prepaid expenses and other current assets	(1,132)	(2,014)
Other assets	(52)	(107)
Accounts payable	1,665	1,304
Accrued liabilities	(744)	629
Other liabilities	(344)	656
Net cash used in operating activities	(29,857)	(27,503)
Cash flows from investing activities
Purchases of property and equipment	(3,438)	(2,006)
Purchases of investments	(53,679)
Proceeds from maturity of investments		60,400
Net cash provided by (used in) investing activities	(57,117)	58,394
Cash flows from financing activities
Proceeds from issuance of common stock	3,067	5,207
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	27,972	5,207
Net change in cash, cash equivalents and restricted cash	(59,002)	36,098
Cash, cash equivalents and restricted cash, beginning of period	110,463	69,776
Cash, cash equivalents and restricted cash, end of period	51,461	105,874
Supplemental disclosure of cash flow information
Cash paid for interest	2,383	1,571
Noncash investing and financing activities:
Accounts payable and accrued liabilities for purchases of property and equipment	176	1,298
Right-of-use asset obtained in exchange for lease obligation	903	$ 3,398
Unpaid debt issuance costs	3
Unpaid deferred offering costs	$ 162