CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (60,377)	$ (97,045)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,781	9,836
Loss on write-off and disposal of property and equipment	113	401
Stock-based compensation	40,824	40,459
Reduction of revenue related to stock warrant issued to customer	2,623	892
Amortization of right-of-use asset	5,108	4,904
Non-cash interest income	(214)	(619)
Accretion or amortization on short-term investments	(3,239)	(5,095)
Change in fair value of warrant liabilities	(126)	(103)
(Recovery) provision for inventory write-down	(373)	2,080
Provision (recovery of) for doubtful accounts	(8)	(587)
Realized gain on sale of investments	(12)	(275)
Changes in operating assets and liabilities:
Accounts receivable	(8,017)	(1,724)
Inventory	(6,775)	4,735
Prepaid expenses and other assets	(3,569)	21,317
Accounts payable	13,202	2,476
Accrued and other liabilities	(5,865)	(28,059)
Contract liabilities	(14,299)	19,036
Operating lease liability	(6,733)	(6,323)
Net cash used in operating activities	(39,956)	(33,694)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sale of property & equipment	0	668
Purchases of property and equipment	(24,893)	(3,756)
Purchase of short-term investments	(149,613)	(144,573)
Proceeds from sales and maturities of short-term investments	138,255	162,313
Net cash provided by (used in) investing activities	(36,251)	14,652
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	83	205
Proceeds from ESPP purchase	1,955	1,703
Payments received (remitted) to fund employees tax obligation for vested RSUs	410	0
Repayments of borrowings	0	(43,975)
Proceeds from the issuance of common stock under at-the-market offering, net of commissions and fees	95,583	57,806
At-the-market offering costs for the issuance of common stock	(421)	(346)
Net cash provided by financing activities	97,610	15,393
Effect of exchange rates on cash and cash equivalents	478	(886)
Net increase (decrease) in cash, cash equivalents and restricted cash	21,881	(4,535)
Cash, cash equivalents and restricted cash at beginning of year	48,099	52,634
Cash, cash equivalents and restricted cash at end of year	69,980	48,099
SUPPLEMENTAL DISCLOSURES OF OPERATING ACTIVITIES:
Cash paid for interest	0	2,073
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION:
Property and equipment purchases included in accounts payable and accrued liabilities	1,166	480
Right-of-use assets obtained in exchange for operating lease liabilities	$ 6,862	$ 0