Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2021
USD ($)
|
Mar. 31, 2020
USD ($)
|
Dec. 31, 2020
USD ($)
|
|
| Number of Operating Segments | 1 | ||
| Number of Geographic Segments | 1 | ||
| Accounts Receivable, after Allowance for Credit Loss, Current, Total | $ 0 | $ 32 | |
| Proceeds from Insurance Settlement, Investing Activities | 0 | $ 4,748 | |
| Insurance Recoveries, Net of Related Expenses | (12) | $ (203) | |
| AquaRefining Fire [Member] | |||
| Proceeds from Insurance Settlement, Investing Activities | 23,600 | ||
| Insurance Recoveries, Net of Related Expenses | 200 | ||
| Escrow Deposit | 1,400 | ||
| Trade Accounts Receivable [Member] | |||
| Accounts Receivable, after Allowance for Credit Loss, Current, Total | $ 0 | $ 0 | |
| X | ||||||||||
- Definition The amount recovered from insurance, net of related expenses. No definition available.
|
| X | ||||||||||
- Definition Number of geographic segments the Company engages in. No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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