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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net Income (Loss) Attributable to Parent $ (9,593) $ (6,850)
Depreciation 302 295
Amortization of debt discount and issuance costs 361 269
Amortization of right-of-use asset 86 33
Interest expense added to loan principal 671 380
Interest expense added to lease liability 634 569
Finance expense 0 307
Compensation charge for stock and share option awards 2,769 1,259
Changes in operating assets and liabilities:    
Accounts receivable (382) (677)
Inventories (32) (650)
Prepaid expenses and other current assets (112) (485)
Other assets 3 40
Accounts payable 1,021 1,485
Lease liabilities (194) (170)
Deferred revenue 723 350
Other accrued liabilities 99 972
Net cash used in operating activities (3,644) (2,873)
Cash flows from investing activities:    
Additions to property, plant and equipment and water programs (1,289) (186)
Additions to deposits for asset purchase options (5,000) 0
Net cash used in investing activities (6,289) (186)
Cash flows from financing activities:    
Net proceeds from issuance of stock 18,335 0
Dividend payments (1,288) (1,288)
Proceeds from the issuance of long-term debt 0 20,000
Principal payments on long-term debt (40) (52)
Issuance costs long-term debt 0 (839)
Taxes paid related to net share settlement of equity awards (172) (52)
Net cash provided by financing activities 16,835 17,769
Net increase in cash, cash equivalents and restricted cash 6,902 14,710
Cash, cash equivalents and restricted cash, beginning of period 17,426 4,636
Cash, cash equivalents and restricted cash, end of period $ 24,328 $ 19,346