Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
OPERATING ACTIVITIES
Net Income (Loss)	$ (73,600)	$ (86,599)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	15,414	28,207
Depreciation and amortization	6,104	6,176
Loss on disposal of property and equipment	1,014	279
Net amortization of premium on available-for-sale securities	1,141	3,053
Provision for inventory excess and obsolescence	148	179
Non-cash operating lease expense	(9)	91
Loss on equity method investment	5,919	2,649
Changes in operating assets and liabilities:
Accounts receivable, net	277	487
Prepaid expenses and other assets	1,570	(92)
Inventory	(2,901)	(2,668)
Accounts payable	1,062	3,355
Deferred revenue	(67)	202
Accrued liabilities and other liabilities	(520)	(1,428)
Net cash used in operating activities	(44,448)	(46,109)
INVESTING ACTIVITIES
Purchases of property and equipment	(1,797)	(3,584)
Proceeds from disposal of property and equipment	646	343
Purchases of available-for-sale securities	(173,170)	(262,926)
Proceeds from maturities of available-for-sale securities	237,814	342,025
Purchase of equity security	(1,945)	(10,000)
Net cash provided by investing activities	61,548	65,858
FINANCING ACTIVITIES
Proceeds from exercise of Class A common stock options	56	0
Repurchases of Class A common stock under share repurchase program	(10,199)	(11,816)
Taxes paid related to net settlement of restricted stock units	(827)	0
Proceeds from issuance of Class A common stock in connection with employee stock purchase plan	402	321
Net cash used in financing activities	(10,568)	(11,495)
Net increase in cash, cash equivalents and restricted cash	6,532	8,254
Cash, cash equivalents and restricted cash, beginning of period	41,277	33,023
Cash, cash equivalents and restricted cash, end of period	47,809	41,277
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for income taxes	182	154
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES
Capitalized stock-based compensation related to internal-use software development	169	220
Property and equipment purchases included in accounts payable and accrued expenses	131	248
Inventory transferred to property and equipment	2,456	242
Property and equipment transferred to inventory	$ 62	$ 699