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Note 5 - Loan Payable (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 72 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 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 $ 9,160,313   $ 9,160,313   $ 9,160,313    
Accrued Interest and Late Charges Payable 1,406,313   1,406,313   1,406,313    
Line of Credit Facility, Maximum Borrowing Capacity 7,754,000   $ 7,754,000   7,754,000    
Term Loan, Period for Interest Only Payments     3 years        
Term Loan, Period for Amortization of Principal     10 years        
Repayments of Long-term Debt, Total         3,502,000    
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 771,000   $ 771,000   771,000    
Long-term Debt, Maturities, Repayments of Principal in Year Two 794,000   794,000   794,000    
Long-term Debt, Maturities, Repayments of Principal in Year Three 819,000   819,000   819,000    
Long-term Debt, Maturities, Repayments of Principal in Year Four 846,000   846,000   846,000    
Long-term Debt, Maturities, Repayments of Principal in Year Five 873,000   873,000   873,000    
Long-term Debt, Maturities, Repayments of Principal after Year Five 149,000   149,000   $ 149,000    
Interest Expense, Debt, Total $ 60,408 $ 49,373 $ 113,747 $ 98,747      
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%