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Note 3 - Liquidity and Going Concern (Details Textual) - USD ($)
9 Months Ended
Apr. 23, 2021
Sep. 30, 2021
Sep. 30, 2020
Apr. 30, 2021
Cumulative Net Loss   $ (13,000,000)    
Proceeds from Sale of Buildings   3,500,000 $ 0  
Lake Barrington Facility Lease [Member]        
Lessee, Operating Lease, Term of Contract (Year) 10 years     10 years
Lessee, Operating Lease, Annual Base Rent on First Year $ 500,000     $ 500,000
Lessee, Operating Lease, Annual Base Rent on Last Year 652,386     $ 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      
Line Financial [Member] | Line Financial Agreement [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Remaining Borrowing Capacity   $ 1,000,000.0    
PNC [Member] | PNC Agreements [Member] | Term Loan [Member]        
Long-term Debt, Total $ 2,000,000