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Description of Business and Summary of Significant Accounting Policies - Goodwill and Long-Lived Assets (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
segment
reporting_unit
Mar. 31, 2021
segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Number of operating segments | segment   1 2
Number of reportable segments | segment   1 2
Number of reporting units | reporting_unit   3  
Impairment charges | $ $ 300,000 $ 0  
Impairment loss from previously capitalized contract costs | $   $ 900,000