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Notes payable (Details 1) - USD ($)
Jun. 30, 2019
Jun. 30, 2018
Debt Instrument [Line Items]    
Long-term Debt $ 1,351,021 $ 1,365,132
Notes payable    
Debt Instrument [Line Items]    
2020 1,314,021  
2021 37,000  
Long-term Debt $ 1,351,021