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Note 7 - Leases (Details Textual)			9 Months Ended
	Dec. 14, 2020 USD ($)	Feb. 29, 2016 USD ($) a	Sep. 30, 2021 USD ($)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability			$ 3,300,000
Operating Lease, Cost			255,000
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
US Bureau of Land Management (“BLM”) [Member]
Right of Way Agreement, Period (Year)	29 years
Right of Way Agreement, Annual Rent Expense	$ 321,000
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Month)			2 months
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Month)			28 years

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The amount of annual rent expense under the right of way agreement.

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Area of a real estate property.

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
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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

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Amount of lease payment to be received by lessor for operating lease in fourth 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).

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Amount of lease payment to be received by lessor for operating lease in second 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).

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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