v3.25.1
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net loss $ (34,867) $ (35,326)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,388 1,345
Impairment of inventories 33 465
Change in fair value of warrant liability 5,400 437
Stock-based compensation 4,564 5,261
Amortization of right-of-use assets 902 845
Amortization of premium and accretion of discount on available-for-sale securities, net (477) (1,087)
Changes in operating assets and liabilities:    
Accounts receivable 412 (350)
Inventories (1,570) (251)
Other current assets 1,634 312
Other noncurrent assets (192) 70
Accounts payable (2,454) (89)
Accrued liabilities (378) (10)
Accrued employee costs (1,071) (3,600)
Lease liability (950) (866)
Other current liabilities (3,166) 1,882
Net cash used in operating activities (30,792) (30,962)
Cash flows from investing activities:    
Purchase of property, plant and equipment (459) (1,648)
Purchase of available-for-sale securities (15,969) (38,881)
Proceeds from maturities of available-for-sale securities 39,750 62,565
Net cash provided by investing activities 23,322 22,036
Cash flows from financing activities:    
Payments of taxes withheld on net settled vesting of restricted stock units (183) (55)
Proceeds from exercise of stock options 0 39
Net cash provided by (used in) financing activities (183) (16)
Net decrease in cash and cash equivalents (7,653) (8,942)
Beginning cash and cash equivalents 28,864 38,547
Ending cash and cash equivalents 21,211 29,605
Supplemental disclosures of cash flow information:    
Cash paid for interest 0 0
Cash paid for income taxes (35) 0
Supplemental disclosures of non-cash investing and financing activities:    
Unpaid property, plant and equipment purchases $ 1,055 $ 0