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Stock Option - Fair Value Assumptions (Details)
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Stock option      
Expected dividend yields 0.00%    
2012 Employee Stock Option Plan      
Stock option      
Risk-free interest rates, min     0.60%
Risk-free interest rates, max     2.10%
Risk-free interest rates 1.64%    
Expected lives 6 years 2 months 4 days   10 years
Expected volatility, min     44.00%
Expected volatility, max     46.00%
Expected volatility 43.00%    
Expected dividend yields     0.00%
2012 Non-Employee Stock Option Plan      
Stock option      
Risk-free interest rates 1.68%   1.60%
Expected lives 6 years 2 months 4 days   10 years
Expected volatility 43.00%   44.00%
Expected dividend yields 0.00%   0.00%
2018 Non-Employee Stock Option Plan      
Stock option      
Risk-free interest rates, min     1.60%
Risk-free interest rates, max     1.80%
Risk-free interest rates 1.68%    
Expected lives 6 years 2 months 4 days   10 years
Expected volatility, min     44.00%
Expected volatility, max     45.00%
Expected volatility 43.00%    
Expected dividend yields 0.00%    
2020 Non-Employee Stock Option Plan      
Stock option      
Risk-free interest rates 1.68% 0.62%  
Expected lives 6 years 2 months 4 days 10 years  
Expected volatility 43.00% 45.00%  
Expected dividend yields 0.00% 0.00%