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Note 7 - Long-Term Debt (Details) - Notes Payable to Banks [Member] - USD ($)
1 Months Ended
Jul. 31, 2015
Nov. 30, 2014
Sep. 30, 2017
Mar. 31, 2017
Note to Bank #1 [Member]        
Note 7 - Long-Term Debt (Details) [Line Items]        
  $ 1,200,000    
Debt Instrument, Term   3 years    
Debt Instrument, Maturity Date, Description   November 2017    
Debt Instrument, Frequency of Periodic Payment   Monthly    
Debt Instrument, Periodic Payment   $ 36,551    
Debt Instrument, Interest Rate, Stated Percentage   6.00%    
Notes Payable     $ 72,552 $ 285,810
Notes Payable, Current     72,552  
Debt Instrument, Collateral   collateralized by substantially all of the assets of the Company    
Note to Bank #2 [Member]        
Note 7 - Long-Term Debt (Details) [Line Items]        
$ 18,000      
Debt Instrument, Term 3 years      
Debt Instrument, Frequency of Periodic Payment Monthly      
Debt Instrument, Periodic Payment $ 536      
Debt Instrument, Interest Rate, Stated Percentage 4.50%      
Notes Payable     5,250 $ 8,305
Notes Payable, Current     $ 5,250  
Debt Instrument, Collateral collateralized by substantially all of the assets of the Company