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