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Commitments and Contingencies - Additional Information (Details)
12 Months Ended
Jun. 30, 2020
USD ($)
Guarantee
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
License agreement | WARF (Wisconsin Alumni Research Foundation)      
Loss Contingencies [Line Items]      
License agreement expiration date Aug. 06, 2019    
Royalty costs $ 50,000.00 $ 600,000 $ 500,000
Royalty amount accrued $ 0 200,000  
Financial Guarantee | Three Customers      
Loss Contingencies [Line Items]      
Number of bank guarantees | Guarantee 3    
Bank guarantees $ 1,000,000.0    
Financial Guarantee | Two Customers      
Loss Contingencies [Line Items]      
Bank guarantees   $ 700,000  
3.75% Convertible Notes      
Loss Contingencies [Line Items]      
Interest rate (as a percent) 3.75%