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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash flows from operating activities    
Net loss $ (39,188) $ (33,412)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 5,496 5,124
Provision for credit losses 39 730
Stock-based compensation 4,569 5,317
Impairment of assets 16,610 0
Realized loss (gain) on marketable securities 7 (64)
Amortization of premium and discount of marketable securities, net (49) (24)
Change in fair value of derivative 32 (280)
Change in fair value of common stock warrants liability (3,885) 628
Change in fair value of earnout liability (2,462) (540)
Deferred tax provision 125 150
Other non-cash expenses 221 304
Changes in operating assets and liabilities:    
Accounts receivable net and other receivables 1,116 (1,168)
Inventory 178 (145)
Prepaid expenses and other current assets 554 168
Other long-term assets 83 (4,925)
Accounts payable 86 418
Accrued expenses 744 (3,256)
Operating lease liability (160) (221)
Other liabilities, current 171 (478)
Other liabilities, long-term (20) (23)
Net cash used in operating activities (15,733) (31,697)
Cash flows from investing activities    
Purchases of property, plant, and equipment (15,710) (2,575)
Proceeds from land held for sale 2,117 0
Purchases of marketable securities (655,732) (826,682)
Sales of marketable securities 658,639 805,285
Maturities of marketable securities 10,021 26,177
Net cash (used in) provided by investing activities (665) 2,205
Cash flows from financing activities    
Payment of notes payable (4,542) (1,532)
Proceeds from Canadian Government Research and Development Program 0 8,097
Proceeds from exercise of stock options 57 241
Net cash (used in) provided by financing activities (4,485) 6,806
Effects of foreign exchange rate changes on the balance of cash and cash equivalents held in foreign currencies (129) 2,868
Net decrease in cash and cash equivalents (21,012) (19,818)
Cash and cash equivalents beginning of the period 56,307 75,502
Cash and cash equivalents end of the period 35,295 55,684
Supplemental disclosure of cash flow information    
Purchases of fixed assets included in accounts payable and accrued expenses 8,212 428
Cash paid during the period:    
Income taxes payment 26 7
Interest payment $ 50 $ 646