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Note 5 - Loans Payable (Details Textual) - USD ($)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Sep. 25, 2014
Proceeds from Issuance of Unsecured Debt $ 34,800  
PA-1 [Member]      
Debt Instrument, Debt Default, Amount     $ 8,137,117
Pennvest Loan [Member]      
Construction Loan 9,868,495    
Accrued Interest and Late Charges Payable 2,114,495    
Line of Credit Facility, Maximum Borrowing Capacity $ 7,754,000    
Term Loan, Period for Interest Only Payments (Year) 3 years    
Term Loan, Period for Amortization of Principal (Year) 10 years    
Long-Term Debt, Maturity, Year One $ 5,886,000    
Long-Term Debt, Maturity, Year Two 846,000    
Long-Term Debt, Maturity, Year Three 873,000    
Long-Term Debt, Maturity, Year Four 149,000    
Interest Expense, Debt, Total $ 246,887 246,887  
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