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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash flows from operating activities:    
Net loss $ (30,576) $ (19,166)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 4,427 5,050
Non-cash interest 3,736 2,120
Paid-in-kind interest 4,504 2,789
Non-cash restructuring, impairment and other related charges 635
Loss on disposal of property and equipment 66 88
Change in fair value – warrant liabilities 6,958 (49)
Stock-based compensation 156 368
Changes in operating assets and liabilities:    
Accounts receivable 20,129 8,669
Inventories 1,637 (3,314)
Prepaid expenses and other assets 789 2,229
Operating leases, net (897) (848)
Accounts payable 1,377 (9,701)
Accrued compensation (1,760) (1,970)
Customer prepayments (538) (2,685)
Accrued rebates and allowances (4,843) (3,854)
Accrued warranty liabilities 768 (487)
Other accrued liabilities (2,944) (2,944)
Net cash provided by (used in) operating activities 2,989 (23,070)
Cash flows from investing activities:    
Sale of property and equipment 258
Purchase of property and equipment (1,612) (2,241)
Investment in intangible assets (421) (161)
Net cash used in investing activities (2,033) (2,144)
Cash flows from financing activities:    
Proceeds from related party loan 19,000
Payments for debt issuance costs (346) (1,170)
Net cash provided by (used in) financing activities (346) 17,830
Net increase (decrease) in cash and cash equivalents 610 (7,384)
Cash and cash equivalents, beginning of the period 24,345 29,011
Cash and cash equivalents, end of the period 24,955 21,627
Supplemental disclosures of cash flow information:    
Cash paid during the period for interest, net of amounts capitalized 20 39
Cash paid during the period for income taxes 19 28
Supplemental schedule of non-cash investing and financing activities:    
Property and equipment included in accounts payable 519 459
Warrants issued 5,396
Amendment fee added to principal of loan $ 1,286 $ 978