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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities    
Net loss $ (18,850) $ (23,278)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 692 890
Provision for inventory obsolescence 523 240
Provision for product warranties 261 (2)
(Gain) loss on disposal of property and equipment (2,531) 75
Loss on extinguishment of debt 3,088 0
Stock based compensation 5,114 6,697
Allowance for credit losses 279 315
Non-cash lease expense 87 0
Non-cash interest expense 545 0
Changes in operating assets and liabilities:    
Trade receivables (3,574) 1,918
Income tax receivables 7,545 97
Prepaid expenses and other assets (188) (523)
Inventories 1,459 (5,568)
Accounts payable 25 67
Accrued expenses and other liabilities 276 (1,208)
Net cash used in operating activities (5,249) (20,280)
Cash flows from investing activities    
Purchases of property and equipment (533) (1,010)
Proceeds from sale of property and equipment 7,267 0
Net cash provided by (used in) investing activities 6,734 (1,010)
Cash flows from financing activities    
Proceeds from stock option exercises 86 365
Proceeds from long-term debt 43,474 0
Payment of debt issuance costs (3,106) 0
Proceeds from debt allocated to warrants 2,632 0
Repayment of finance lease liabilities (37) (148)
Extinguishment of credit agreement (11,030) 0
Contributions from non-controlling interests 147 0
Net cash provided by financing activities 32,166 217
Effect of exchange rates on cash (191) 395
Net change in cash and cash equivalents 33,460 (20,678)
Cash and cash equivalents, beginning of year 10,192 30,870
Cash and cash equivalents, end of year 43,652 10,192
Cash paid for:    
Interest expense 1,935 15
Income taxes 329 128
Noncash activities:    
Right-of-use assets capitalized and operating lease liabilities recognized upon execution of lease 4,917 0
Transfer of right-of-use assets to property and equipment on exercise of purchase option 15 0
Right-of-use assets capitalized and operating lease liabilities recognized upon lease modification 0 769
Right-of-use assets capitalized and finance lease liabilities recognized upon execution of lease 0 103
Right-of-use assets and finance lease liabilities derecognized upon execution of lease modification $ 0 $ 28