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14. Warrant liabilities (Tables)
9 Months Ended
Mar. 31, 2021
Warrant liability [Member]  
Schedule of assumptions for warrant liabilities

 

  As of March 31, 2021
Expected term 3 to 5 years
Expected volatility 56% to 58%
Risk-free interest rate 0.35% to 0.92%
Expected dividend rate 0%
Probability 60%