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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss $ (31,446,000) $ (24,792,000)
us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract    
Depreciation 1,247,000 654,000
Amortization of debt discount and issuance costs 414,000 2,414,000
Amortization of right-of-use asset 122,000 18,000
Interest expense added to loan principal 992,000 0
Interest expense added to lease liability 2,107,000 1,866,000
Gain/Loss on equity method investments 0 (40,000)
Loss on early extinguishment of debt 5,331,000 0
Compensation charge for stock and share option awards 1,496,000 1,876,000
Unrealized loss on derivative liabilities 220,000 0
Changes in operating assets and liabilities:    
Accounts receivable (450,000) (184,000)
Inventories (1,790,000) (236,000)
Prepaid expenses and other current assets (128,000) 311,000
Other assets (408,000) (684,000)
Accounts payable 937,000 113,000
Lease liabilities (108,000) (18,000)
Deferred revenue 248,000 0
Other accrued liabilities 292,000 103,000
Net cash used in operating activities (20,924,000) (18,599,000)
Cash flows from investing activities:    
Additions to property, plant and equipment and water programs (5,787,000) (3,376,000)
Contributions to equity-method investments 0 (213,000)
Distributions from equity-method investments 0 217,000
Payments for acquisitions, net of cash acquired 0 (750,000)
Net cash used in investing activities (5,787,000) (4,122,000)
Cash flows from financing activities:    
Net proceeds from issuance of common stock 38,490,000 21,636,000
Dividend payment (5,106,000) (5,106,000)
Proceeds from the issuance of long-term debt 233,000 287,000
Issuance costs of long-term debt (27,000) 0
Principal payments on long-term debt (15,164,000) (170,000)
Costs for extinguishment of debt (600,000) 0
Taxes paid related to net share settlement of equity awards (261,000) 0
Net cash provided by financing activities 17,565,000 16,647,000
Net (decrease) increase in cash, cash equivalents and restricted cash (9,146,000) (6,074,000)
Cash, cash equivalents and restricted cash, beginning of period 13,782,000 19,856,000
Cash, cash equivalents and restricted cash, end of period $ 4,636,000 $ 13,782,000