Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net loss	$ (44,324)	$ (74,398)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	6,473	18,023
Depreciation and amortization	2,449	2,931
Non-cash lease expense	772	700
Non-cash interest expense	1,335	1,241
Amortization of premium on investments, net	(1,028)	(2,928)
Provision for inventories	(160)	706
Loss on disposal of property and equipment	2	23
Provision for credit losses	1,622	1,813
Loss on extinguishment of term loan	7,685	0
Changes in operating assets and liabilities:
Accounts receivable	(893)	(2,953)
Inventories	7,297	(13,214)
Prepaid expenses and other assets	468	1,196
Accounts payable	(2,502)	(544)
Accrued compensation and related benefits	(7,032)	(7,279)
Accrued expenses and other current liabilities	610	(3,695)
Accrued warranty liability	(698)	(1,513)
Deferred revenue	999	1,410
Operating lease liabilities	(866)	(766)
Accrued interest	(2,695)	0
Net cash used in operating activities	(30,486)	(79,247)
Cash flows from investing activities:
Purchases of property and equipment	(415)	(474)
Purchases of investment securities	(153,653)	(128,445)
Sales and maturities of investment securities	44,827	108,829
Net cash used in investing activities	(109,241)	(20,090)
Cash flows from financing activities:
Proceeds from stock option exercises and ESPP purchases	408	2,163
Proceeds from issuance of term loans, net of issuance costs	98,270	66,524
Repayment of term loan and extinguishment costs	(204,954)	0
Proceeds from issuance of Series A convertible preferred stock, net of issuance costs	161,548	0
Net cash provided by financing activities	55,272	68,687
Net decrease in cash, cash equivalents and restricted cash	(84,455)	(30,650)
Cash, cash equivalents and restricted cash as of beginning of period	127,343	71,838
Cash, cash equivalents and restricted cash as of end of period	42,888	41,188
Summary of cash, cash equivalents and restricted cash reported within the balance sheets:
Cash and cash equivalents	39,559	37,859
Restricted cash	3,329	3,329
Total cash, cash equivalents and restricted cash	42,888	41,188
Supplemental cash flow disclosures:
Cash paid for income taxes	212	356
Cash paid for interest	10,140	10,102
Cash paid for amounts included in the measurement of operating lease liabilities	866	766
Supplemental non-cash investing and financing activities:
Capital expenditures included in accounts payable and accrued expenses	101	115
Transfer of inventories to property and equipment	0	148
Fair value of common stock warrant	$ 4,367	$ 0