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9. Long-Term Debt (Details) - Notes Payable to Banks [Member] - USD ($)
1 Months Ended 12 Months Ended
Nov. 13, 2014
Jul. 31, 2015
Mar. 31, 2019
Mar. 31, 2018
Note to Bank #1 [Member]        
9. Long-Term Debt (Details) [Line Items]        
Debt Instrument, Face Amount $ 1,200,000      
Debt Instrument, Term 3 years      
Debt Instrument, Maturity Date Nov. 13, 2017      
Debt Instrument, Frequency of Periodic Payment Monthly      
Debt Instrument, Periodic Payment $ 36,551      
Debt Instrument, Interest Rate, Stated Percentage 6.00%      
Amortization of Deferred Charges     $ 0 $ 3,363
Unamortized Debt Issuance Expense     0 0
Note to Bank #2 [Member]        
9. Long-Term Debt (Details) [Line Items]        
Debt Instrument, Face Amount   $ 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%    
Debt Instrument, Collateral   collateralized by substantially all of the assets of the Company    
Notes Payable     $ 0 $ 2,124