v3.26.1
Condensed Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Cash flows from operating activities:        
Net Loss $ (6,941) $ (2,391) $ (39,671) $ (30,064)
Adjustments to reconcile net loss to net cash used in operating activities        
Depreciation and amortization 916 810 3,589 2,519
Amortization of operating right-of-use assets 121 114 476 584
Stock-based compensation 125 183 553 513
Amortization of debt discount and issuance costs 235 90 625 495
Provision for credit losses 3,839
Provision for inventory reserve 107 286 339
Change in fair value of SAFE liability 134 (2,114) 328 9,376
Change in fair value of derivative liability 21 3 (2,842) (31)
Loss on extinguishment of debt     16,040
Change in fair value of warrant liability (72) (7)    
Non-cash loss on issuance of SAFEs and common stock warrants 2,217 3,061
Loss on abandoned financing transaction 345    
Other 3 (35) 12 (67)
Changes in operating assets and liabilities:        
Accounts receivable, net (76) (383) (677) (832)
Inventory, net (57) 673 664 (364)
Prepaid expenses and other assets (119) (197) (488) (983)
Accounts payable 690 264 1,341 (103)
Accrued expenses and other liabilities 259 (1,277) 1,986 1,348
Operating lease liabilities (121) (118) (471) (572)
Net cash used in operating activities: (2,213) (4,385) (11,349) (17,842)
Cash flows from investing activities:        
Purchases of property and equipment (1,483) (838) (3,025) (3,239)
Net cash used in investing activities (1,483) (838) (3,025) (3,239)
Cash flows from financing activities:        
Proceeds from issuance of SAFEs 2,448 137 8,293 16,250
Proceeds from exercise of stock options 100 3 130 47
Proceeds from exercise of common stock warrants 26 8
Proceeds from short-term debt, net of issuance costs 831    
Proceeds from convertible notes, net of issuance costs     9,357
Proceeds from related party advances 360 2,239 1,725
Repayment of related party advances (30) (1,770) (1,725)
Repayment on short-term debt (9)    
Repayment on term loan (26)    
Proceeds from related party promissory note     440
Payments on debt financing     (26) (38)
Proceeds from exercise of preferred stock warrant     154
Payment for deferred transaction costs (180)    
Net cash provided by financing activities 3,546 114 9,468 25,616
Net increase (decrease) in cash, cash equivalents and restricted cash (150) (5,109) (4,906) 4,535
Cash, cash equivalents and restricted cash, beginning of period 432 5,338 5,338 803
Cash, cash equivalents and restricted cash, end of period 282 229 432 5,338
Components of cash, cash equivalent, and restricted cash        
Cash and cash equivalents 129 64 279 5,173
Restricted cash in prepaid expenses and other current assets 12 12 12 14
Restricted cash, non-current 141 153 141 151
Total cash, cash equivalents, and restricted cash 282 229 432 5,338
Supplemental cash flow disclosure:        
Cash paid for income taxes 12 49 2
Cash paid for interest 261 615 1,226
Non-cash investing and financing activities:        
Property and equipment included in accounts payable 3,069 1,168 4,541 355
Issuance of preferred stock upon conversion of SAFEs 6,668 54,790
Issuance of preferred stock upon conversion of convertible notes     31,471
Issuance of common stock warrants     3,545 76
Conversion of related party advances to SAFE liability     469
Conversion of accrued interest on 2023 Term Loan into SAFE liability     352
Transfer of prepaid deposit to property and equipment     1,242
Issuance of common stock warrants in connection with issuance of SAFEs and promissory notes 2,822 121    
Conversion of related party advance into promissory note 330    
Transfer of inventory to property and equipment 35 111 162
Asset retirement obligations incurred and capitalized 6 53 $ 67 $ 264
Deferred transaction costs incurred but unpaid at period-end $ 726