Condensed Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net Income (Loss)	$ (74,398)	$ (88,017)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	18,023	18,643
Depreciation and amortization	2,931	2,898
Non-cash lease expense	700	603
Non-cash interest expense	1,241	914
Amortization of premium on investments, net	(2,928)	(3,353)
Provision for inventories	706	868
Loss on disposal of property and equipment	23	93
Allowance for credit losses	1,813	87
Changes in operating assets and liabilities:
Accounts receivable	(2,953)	(8,919)
Inventories	(13,214)	6,114
Prepaid expenses and other assets	1,196	1,196
Accounts payable	(544)	1,682
Accrued compensation and related benefits	(7,279)	(4,058)
Accrued expenses and other current liabilities	(3,695)	(3,720)
Accrued warranty liability	(1,513)	547
Deferred revenue	1,410	2,130
Operating lease liabilities	(766)	(640)
Net cash used in operating activities	(79,247)	(72,932)
Cash flows from investing activities:
Purchases of property and equipment	(474)	(1,605)
Purchases of investment securities	(128,445)	(97,849)
Maturities of investment securities	108,829	129,250
Net cash (used in) provided by investing activities	(20,090)	29,796
Cash flows from financing activities:
Proceeds from stock option exercises and ESPP purchases	2,163	6,320
Proceeds from issuance of term loans, net of issuance costs	66,524	0
Net cash provided by financing activities	68,687	6,320
Net decrease in cash, cash equivalents and restricted cash	(30,650)	(36,816)
Cash, cash equivalents and restricted cash as of beginning of period	71,838	76,533
Cash, cash equivalents and restricted cash as of end of period	41,188	39,717
Supplemental cash flow disclosures:
Cash paid for income taxes	356	311
Cash paid for interest	10,102	5,131
Cash paid for amounts included in the measurement of operating lease liabilities	766	640
Supplemental non-cash investing and financing activities:
Capital expenditures included in accounts payable and accrued expenses	115	216
Right-of-use assets obtained in exchange for operating lease liabilities	0	528
Transfer of inventories to property and equipment	$ 148	$ 0