FINANCIAL INSTRUMENTS - RISK MANAGEMENT - Financial liabilities by category (Details) - USD ($)
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Amortized cost      
Financial liabilities by category      
Financial liabilities $ 211,875,137 $ 152,771,707 $ 146,012,285
Fair value      
Financial liabilities by category      
Financial liabilities 1,686,643 2,861,511  
Trade and other payables | Amortized cost      
Financial liabilities by category      
Financial liabilities 57,742,516 41,031,148 27,708,830
Borrowings | Amortized cost      
Financial liabilities by category      
Financial liabilities 104,948,345 103,556,730 91,017,133
Employee benefits and social security | Amortized cost      
Financial liabilities by category      
Financial liabilities 5,044,630 5,357,218 4,411,713
Financed payment - Acquisition of business | Amortized cost      
Financial liabilities by category      
Financial liabilities   2,826,611 $ 22,874,609
Private warrants | Fair value      
Financial liabilities by category      
Financial liabilities 1,686,643 $ 2,861,511  
Convertible notes | Amortized cost      
Financial liabilities by category      
Financial liabilities 43,029,834    
Lease liability | Amortized cost      
Financial liabilities by category      
Financial liabilities $ 1,109,812