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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Cash flows from operating activities:    
Net loss $ (31,140,000) $ (31,446,000)
us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract    
Depreciation 1,214,000 1,247,000
Amortization of debt discount and issuance costs 1,316,000 414,000
Amortization of right-of-use asset 163,000 122,000
Interest expense added to loan principal 2,360,000 992,000
Interest expense added to lease liability 2,373,000 2,107,000
Finance Expense 307,000 0
Loss on early extinguishment of debt 0 5,331,000
Compensation charge for stock and share option awards 4,605,000 1,496,000
Unrealized loss on derivative liabilities 0 220,000
Changes in operating assets and liabilities:    
Accounts receivable (3,682,000) (450,000)
Inventories (914,000) (1,790,000)
Prepaid expenses and other current assets (380,000) (128,000)
Other assets 106,000 (408,000)
Accounts payable (392,000) 937,000
Lease liabilities (136,000) (108,000)
Deferred revenue 853,000 248,000
Other accrued liabilities 1,815,000 292,000
Net cash used in operating activities (21,532,000) (20,924,000)
Cash flows from investing activities:    
Additions to property, plant and equipment and water programs (934,000) (5,787,000)
Payments for contingent consideration liabilities (250,000) 0
Net cash used in investing activities (1,184,000) (5,787,000)
Cash flows from financing activities:    
Net proceeds from issuance of common stock 22,135,000 38,490,000
Dividend payment (5,106,000) (5,106,000)
Proceeds from the issuance of long-term debt 20,000,000 233,000
Issuance costs of long-term debt (1,294,000) (27,000)
Principal payments on long-term debt (177,000) (15,164,000)
Costs for extinguishment of debt 0 (600,000)
Taxes paid related to net share settlement of equity awards (52,000) (261,000)
Net cash provided by financing activities 35,506,000 17,565,000
Net (decrease) increase in cash, cash equivalents and restricted cash 12,790,000 (9,146,000)
Cash, cash equivalents and restricted cash, beginning of period 4,636,000 13,782,000
Cash, cash equivalents and restricted cash, end of period $ 17,426,000 $ 4,636,000