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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash flows from operating activities:    
Net loss $ (2,393,000) $ (2,704,000)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation 4,000 4,000
Share-based compensation expense 597,000 417,000
Other non-cash expense 99,000 85,000
Other non-cash expense 1,000 0
Changes in operating assets and liabilities    
Prepaid expenses (477,000) (828,000)
Accounts payable (252,000) 12,000
Accrued liabilities (110,000) (622,000)
Operating lease liabilities (90,000) (79,000)
Other changes in operating assets and liabilities 4,000 13,000
Net cash used in operating activities (2,617,000) (3,702,000)
Cash flows from investing activities:    
Additions to property, plant and equipment (458,000) (473,000)
Reimbursements of development costs in accordance with the JDA 141,000 461,000
Net cash used in investing activities (317,000) (12,000)
Cash flows from financing activities:    
Issuance of Class A common stock to Cottonmouth 0 50,000,000
Payment of equity issuance costs 0 (50,000)
Net cash provided by financing activities 0 49,950,000
Net change in cash, cash equivalents and restricted cash (2,934,000) 46,236,000
Cash, cash equivalents and restricted cash, beginning of year 57,315,000 19,144,000
Cash, cash equivalents and restricted cash, end of period 54,381,000 65,380,000
Supplemental cash flows:    
Capital expenditures in accounts payable and accrued liabilities (at period end) 1,000 901,000
Accounts receivable for reimbursement of capital expenditures (at period end) 0 639,000
Equity issuance costs in accounts payable and accrued liabilities (at period end) $ 0 $ 560,000