Condensed consolidated statements of cash flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (28,020)	$ (33,932)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	1,243	696
Stock-based compensation expense	2,241	581
Change in fair value of preferred stock warrant liability		11,483
Provision recorded for inventory	49	38
Noncash lease expense	549
Noncash interest expense		295
Loss (gain) on disposal of property and equipment	19	(18)
Accretion on investments	(22)	(4)
Other	(125)
Changes in operating assets and liabilities
Accounts receivable	905	1,931
Inventory	(5,671)	(2,984)
Prepaid expenses and other current assets	1,952	(43)
Other long-term assets	84	(172)
Accounts payable	(1,122)	(1,894)
Accrued expenses and other current liabilities	(4,482)	1,373
Deferred revenue	613	(56)
Deferred rent, long term		(62)
Net cash used in operating activities	(31,787)	(22,768)
Cash flows from investing activities:
Purchases of property and equipment	(4,342)	(792)
Proceeds from sale of property and equipment		20
Purchases of investments	(117,993)
Maturity of investments	25,000	15,000
Net cash (used) provided by investing activities	(97,335)	14,228
Cash flows from financing activities:
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs		79,743
Proceeds from issuance of Class A common stock upon stock option exercise	471	287
Proceeds from issuance of restricted Class A stock award		523
Payments on finance lease obligations	(16)
Payments of deferred offering costs		(1,861)
Net cash provided by financing activities	455	78,692
Net (decrease) increase in cash, cash equivalents and restricted cash	(128,667)	70,152
Cash, cash equivalents and restricted cash at beginning of period	178,671	30,179
Cash, cash equivalents and restricted cash at end of period	50,004	100,331
Supplemental disclosure of cash flow information
Cash paid for interest	21	1,098
Supplemental disclosure of non-cash investing activities
Establishment of right of use operating assets	7,605
Purchases of property and equipment in accounts payable	380	110
Supplemental disclosure of non-cash financing activities
Establishment of right of use finance assets	$ 366
Deferred offering costs included in accounts payable and accrued expenses		780
Accretion of redeemable convertible preferred stock to redemption value		1,971
Cumulative redeemable convertible preferred stock dividends		$ 2,296