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Note 5 - Loans Payable (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Sep. 25, 2014
Jan. 26, 2009
Construction Loan             $ 7,750,000
PA-1 [Member]              
Debt Instrument, Debt Default, Amount $ 8,137,117   $ 8,137,117     $ 8,137,117  
Pennvest Loan [Member]              
Construction Loan 9,797,842   9,797,842        
Accrued Interest and Late Charges Payable 2,043,842   2,043,842        
Line of Credit Facility, Maximum Borrowing Capacity 7,754,000   $ 7,754,000        
Term Loan, Period for Interest Only Payments (Year)     3 years        
Term Loan, Period for Amortization of Principal (Year)     10 years        
Debt Instrument, Annual Principal Payment 5,067,000   $ 5,067,000        
Long-Term Debt, Maturity, Year One 819,000   819,000        
Long-Term Debt, Maturity, Year Two 846,000   846,000        
Long-Term Debt, Maturity, Year Three 873,000   873,000        
Long-Term Debt, Maturity, Year Four 149,000   149,000        
Interest Expense, Debt, Total $ 61,722 $ 61,722 $ 185,166 $ 185,166      
Pennvest Loan [Member] | Years One Through Five [Member]              
Debt Instrument, Interest Rate During Period     2.547%        
Pennvest Loan [Member] | Years Six Through Maturity [Member]              
Debt Instrument, Interest Rate During Period     3.184%        
Paycheck Protection Program CARES Act [Member]              
Proceeds from Issuance of Unsecured Debt         $ 34,800