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Fair Value Measurements of Financial Measurements - Additional Information (Details) - USD ($)
Jun. 30, 2020
Jun. 30, 2019
Fair Value Measurements Recurring    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Financial assets, level 1 to level 2 transfers, amount $ 0 $ 0
Financial assets, level 2 to level 1 transfers, amount 0 $ 0
Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Fair value of long-term debt $ 1,133,600