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Note 12 - Leases (Details Textual) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2021 USD ($) | Dec. 14, 2020 USD ($) | Feb. 29, 2016 USD ($) a | Dec. 31, 2021 USD ($)
Operating Lease, Cost |  |  |  | $ 335,000
Fenner Valley Farms LLC Lease Agreement [Member] |  |  |  |
Lessor, Operating Lease, Term of Contract (Year) |  |  | 99 years |
Area of Real Estate Property (Acre) | a |  |  | 2,100 |
Long-term Debt, Total |  |  | $ 12,000,000.0 |
Lessor, Operating Lease, Payment to be Received, Year One |  |  |  | 420,000
Lessor, Operating Lease, Payment to be Received, Year Two |  |  |  | 420,000
Lessor, Operating Lease, Payment to be Received, Year Three |  |  |  | 420,000
Lessor, Operating Lease, Payment to be Received, Year Four |  |  |  | 420,000
Lessor, Operating Lease, Payment to be Received, Year Five |  |  |  | $ 420,000
Minimum [Member] |  |  |  |
Lessee, Operating Lease, Remaining Lease Term (Month) |  |  |  | 1 month
Maximum [Member] |  |  |  |
Lessee, Operating Lease, Remaining Lease Term (Month) |  |  |  | 28 years
US Bureau of Land Management (“BLM”) [Member] |  |  |  |
Right of Way Agreement, Period (Year) | 29 years | 30 years |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | $ 3,300,000 |  |  |
Right of Way Agreement, Annual Rent Expense | $ 321,000 | $ 321,000 |  |

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- Definition Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
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- Definition Amount of lease payment to be received by lessor for operating lease in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919396-209981 + Details
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