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Note 5 - Loan Payable (Details Textual) - USD ($)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Sep. 25, 2014
Jan. 26, 2009
Construction Loan       $ 7,750,000
PA-1 [Member]        
Debt Instrument, Debt Default, Amount     $ 8,137,117  
Pennvest Loan [Member]        
Construction Loan $ 9,303,270      
Accrued Interest and Late Charges Payable 1,549,270      
Line of Credit Facility, Maximum Borrowing Capacity $ 7,754,000      
Term Loan, Period for Interest Only Payments 3 years      
Term Loan, Period for Amortization of Principal 10 years      
Debt Instrument, Annual Principal Payment $ 4,273,000      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 794,000      
Long-term Debt, Maturities, Repayments of Principal in Year Two 819,000      
Long-term Debt, Maturities, Repayments of Principal in Year Three 846,000      
Long-term Debt, Maturities, Repayments of Principal in Year Four 873,000      
Long-term Debt, Maturities, Repayments of Principal in Year Five 149,000      
Interest Expense, Debt, Total $ 238,655 $ 197,494    
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%