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Represents information about interest payments on the corporate secured debt paid in stock.

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Working capital.

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The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of the fee that accompanies borrowing money under the debt instrument.

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Gross amount of debt extinguished.

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Note 1 - Basis of Presentation (Details Textual) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
	Mar. 31, 2018	May 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 27, 2018
Net Income (Loss) Attributable to Parent, Total			$ (5,971)	$ (7,227)
Working Capital	$ 5,600		5,600
Net Cash Provided by (Used in) Operating Activities, Total			(3,937)	$ (2,635)
Stock Issued During Period, Value, New Issues
Percentage of Future Quarterly Interest Payments	25.00%		25.00%
Interest Payments in Stock			$ 311
Debt Conversion, Original Debt, Amount			$ 1,680
Stock Issued During Period, Shares, Conversion of Convertible Securities			215,852
At Market Issuance Sales Agreement [Member]
At Market Issuance Sales Agreement, Maximum Aggregate Offering Price					$ 15,000
Stock Issued During Period, Value, New Issues	$ 0
Cadiz Valley Water Conservation, Recovery and Storage Project [Member]
Debt Instrument, Maximum Receivable Amount Related to Conditional Commitment Letter		$ 240,000
124-mile Extension Possible for Northern Pipeline, Available for Purchase [Member]
Required Payment to Acquire Property Available for Purchase, Due End of Fiscal Year	$ 20,000		$ 20,000
Senior Secured Debt [Member]
Debt Instrument, Fee Amount		60,000
Debt Instrument, Additional Amount after Refinance		15,000
Prior Senior Secured Debt [Member]
Extinguishment of Debt, Amount		$ 45,000