Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES
Net Income (Loss)	$ (64,857)	$ (68,478)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	21,768	26,810
Depreciation and amortization	4,568	3,998
Loss on disposal of property and equipment	270	258
Net amortization (accretion) of premium (discount) on available-for-sale securities	2,559	(8,545)
Provision for inventory excess and obsolescence	127	825
Non-cash operating lease expense	72	164
Loss on equity method investment	861	0
Changes in operating assets and liabilities:
Accounts receivable, net	266	(728)
Prepaid expenses and other assets	226	(1,080)
Inventory	(1,977)	(1,634)
Accounts payable	(327)	(1,353)
Deferred revenue	148	52
Accrued liabilities and other liabilities	1,644	836
Net cash used in operating activities	(34,652)	(48,875)
INVESTING ACTIVITIES
Purchases of property and equipment	(4,120)	(5,470)
Purchase of available-for-sale securities	(209,214)	(318,049)
Proceeds from sale of available-for-sale securities	0	2,990
Proceeds from maturities of available-for-sale securities	273,346	352,322
Purchase of equity security	(10,000)	0
Net cash provided by investing activities	50,012	31,793
FINANCING ACTIVITIES
Repurchase of Class A common stock	0	(13)
Proceeds from exercise of Class A common stock options	0	91
Repurchases of Class A common stock under share repurchase program	(10,384)	0
Proceeds from issuance of Class A common stock in connection with employee stock purchase plan	147	192
Net cash (used in) provided by financing activities	(10,237)	270
Net increase (decrease) in cash, cash equivalents and restricted cash	5,123	(16,812)
Cash, cash equivalents and restricted cash, beginning of period	33,023	53,732
Cash, cash equivalents and restricted cash, end of period	38,146	36,920
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES
Capitalized stock-based compensation related to internal-use software development	164	0
Property and equipment purchases included in accounts payable and accrued expenses	47	250
Inventory transferred to property and equipment	0	1,211
Property and equipment transferred to inventory	$ 594	$ 0