Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (17,755,000)	$ (11,395,000)
us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
Depreciation	634,000	293,000
Amortization of debt discount and issuance costs	273,000	1,160,000
Amortization of right-of-use asset	59,000	12,000
Interest expense added to loan principal	435,000	0
Interest expense added to lease liability	1,032,000	913,000
Unrealized loss on derivative liability	220,000	0
Loss on early extinguishment of debt	5,331,000	0
Loss on equity method investments	0	169,000
Compensation charge for stock and share option awards	489,000	856,000
Changes in operating assets and liabilities:
Accounts receivable	(426,000)	116,000
Inventories	(849,000)	(344,000)
Prepaid expenses and other current assets	(233,000)	125,000
Other assets	(443,000)	(242,000)
Accounts payable	816,000	216,000
Lease liabilities	(53,000)	(172,000)
Other accrued liabilities	599,000	743,000
Net cash used in operating activities	(9,871,000)	(7,550,000)
Cash flows from investing activities:
Additions to property, plant and equipment and water programs	(3,213,000)	(1,748,000)
Contributions to equity-method investments	0	(100,000)
Net cash used in investing activities	(3,213,000)	(1,848,000)
Cash flows from financing activities:
Net proceeds from issuance of stock	38,490,000	11,741,000
Dividend payments	(2,553,000)	(2,553,000)
Principal payments on long-term debt	(15,088,000)	(69,000)
Issuance costs of long-term debt	(27,000)	0
Costs for early 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	19,961,000	9,119,000
Net increase in cash, cash equivalents and restricted cash	6,877,000	(279,000)
Cash, cash equivalents and restricted cash, beginning of period	13,782,000	19,856,000
Cash, cash equivalents and restricted cash, end of period	$ 20,659,000	$ 19,577,000