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Stockholders' Equity - Schedule of Fair Value of ESPP Offerings (Details)
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected term (in years) 6 years 3 months 6 years 3 months 6 years 3 months
Risk-free interest rate, minimum 0.35% 2.19% 2.05%
Risk-free interest rate, maximum 1.88% 2.89% 2.89%
Expected dividend yield 0.00% 0.00% 0.00%
2019 Employee Stock Purchase Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected volatility 50.00%    
Risk-free interest rate, minimum 1.47%    
Risk-free interest rate, maximum 1.56%    
Expected dividend yield 0.00%    
2019 Employee Stock Purchase Plan | Minimum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected term (in years) 6 months    
2019 Employee Stock Purchase Plan | Maximum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected term (in years) 1 year 2 months 1 day