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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 2 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 11, 2021 | Dec. 31, 2020 | Dec. 31, 2020 | Sep. 30, 2020 | Dec. 31, 2019
Restricted Cash and Cash Equivalents, Noncurrent, Total |  | $ 3,885,000 | $ 3,885,000 |  | $ 7,185,000
Asset Retirement Obligation, Ending Balance |  | $ 100,000 | $ 100,000 |  | $ 100,000
AWMS Holdings, LLC [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 47.00% | 47.00% | 47.00% | 47.00%
Land and Land Improvements [Member] | Minimum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  | 10 years |  |
Land and Land Improvements [Member] | Maximum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  | 30 years |  |
Building and Building Improvements [Member] | Minimum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  | 5 years |  |
Building and Building Improvements [Member] | Maximum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  | 50 years |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  | 3 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  | 10 years |  |
Paycheck Protection Program CARES Act [Member] |  |  |  |  |
Debt Instrument, Decrease, Forgiveness |  | $ 800,000 |  |  |
Paycheck Protection Program CARES Act [Member] | Subsequent Event [Member] |  |  |  |  |
Debt Instrument, Decrease, Forgiveness | $ 1,100,000 |  |  |  |

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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