Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (11,395,000)	$ (17,506,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, Total	293,000	206,000
Amortization of debt discount and issuance costs	1,160,000	2,372,000
Amortization of right-of-use asset	12,000	15,000
Interest expense added to loan principal	0	4,209,000
Interest expense added to lease liability	913,000	806,000
Loss on equity method investments	169,000	569,000
Compensation charge for stock and share option awards	856,000	3,440,000
Unrealized (gain) loss on warrant derivative liabilities	0	(573,000)
Changes in operating assets and liabilities:
Accounts receivable	116,000	(11,000)
Prepaid expenses and other current assets	(219,000)	(544,000)
Other assets	(242,000)	177,000
Accounts payable	216,000	(154,000)
Lease liabilities	(172,000)	(175,000)
Other accrued liabilities	743,000	1,170,000
Net cash used in operating activities	(7,550,000)	(5,999,000)
Cash flows from investing activities:
Additions to property, plant and equipment and water programs	(1,748,000)	(20,177,000)
Contributions to equity-method investments	(100,000)	(259,000)
Net cash used in investing activities	(1,848,000)	(20,436,000)
Cash flows from financing activities:
Net proceeds from issuance of stock	11,741,000	30,354,000
Proceeds from the issuance of warrants	0	4,000
Dividend payments	(2,553,000)	0
Principal payments on long-term debt	(69,000)	(27,000)
Net cash provided by financing activities	9,119,000	30,331,000
Net (decrease) increase in cash, cash equivalents and restricted cash	(279,000)	3,896,000
Cash, cash equivalents and restricted cash, beginning of period	19,856,000	7,424,000
Cash, cash equivalents and restricted cash, end of period	$ 19,577,000	$ 11,320,000