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14. Warrant liabilities (Details - Assumptions) - Warrant liability [Member]
9 Months Ended
Mar. 31, 2021
Measurement Input Expected Term [Member]  
Fair value measurement assumptions 3 to 5 years
Measurement Input Price Volatility [Member]  
Fair value measurement assumptions 56% to 58%
Measurement Input Risk Free Interest Rate [Member]  
Fair value measurement assumptions 0.35% to 0.92%
Measurement Input Expected Dividend Rate [Member]  
Fair value measurement assumptions 0%
Measurement input probability [Member]  
Fair value measurement assumptions 60%