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Stock Options - Weighted Average Assumptions of Black-Scholes Option Pricing Model to Estimate Fair Value of Options Granted (Details)
9 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
2012 Employee Plan      
Stock options      
Risk-free interest rates, min   1.30%  
Risk-free interest rates, max   2.10%  
Expected lives   10 years  
Expected volatility, min   44.00%  
Expected volatility, max   46.00%  
Expected dividend yields   0.00%  
2018 Non-Employee Plan      
Stock options      
Risk-free interest rates, min   1.60%  
Risk-free interest rates, max   1.80%  
Expected lives   10 years  
Expected volatility, min   44.00%  
Expected volatility, max     45.00%
Expected dividend yields   0.00%  
2020 Non-Employee Plan      
Stock options      
Risk-free interest rates 0.62%    
Expected lives 10 years    
Expected volatility 45.00%    
Expected dividend yields 0.00%