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Summary of Significant Accounting Policies - Concentration Risk and Inventories (Details) - contract
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Concentration of revenues        
Number of customers with concentration   0   0
Concentration risk (as a percent)   10.00%   10.00%
Revenue | Customer Concentration Risk        
Concentration of revenues        
Number of customers with concentration 1   0  
Concentration risk (as a percent) 10.00%   10.00%