Note 3 - Liquidity and Going Concern (Details Textual) - USD ($)		3 Months Ended		12 Months Ended	39 Months Ended
	Apr. 23, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Mar. 31, 2022
Net Income (Loss) Attributable to Parent, Total		$ (21,000)	$ (422,000)		$ (23,000,000)
Loan Amendment [Member] | Revolving Credit Facility [Member]
Repayments of Debt	$ 1,500,000
PNC [Member] | PNC Agreements [Member]
Debt Instrument, Forbearance Fee	1,000,000			$ 250,000
Debt Instrument, Increase (Decrease) in Forbearance Fee if Equity Issuance Occurs	(250,000)
Debt Instrument, Forbearance Fee if Equity Issuance Occurs	750,000
Debt Instrument, Increase (Decrease) in Forbearance Fee if Full Cash Payments Received	(500,000)
Debt Instrument, Forbearance Fee if Full Cash Payments Received	250,000
PNC [Member] | PNC Agreements [Member] | Term Loan [Member]
Repayments of Debt	$ 2,000,000
Lake Barrington Facility Lease [Member]
Lessee, Operating Lease, Term of Contract (Year)	10 years
Lessee, Operating Lease, Annual Base Rent on First Year	$ 500,000
Lessee, Operating Lease, Annual Base Rent on Last Year	652,386
Lake Barrington Facility [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Disposal Group, Including Discontinued Operation, Consideration	3,500,000
Proceeds from Sale of Buildings	2,000,000
Financing Receivable, before Allowance for Credit Loss, Total	$ 1,500,000