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Fair Value Measurements - Additional Disclosures (Details)
$ in Millions
1 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
Sep. 30, 2020
Apr. 30, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Amount received in previously escrowed seller funds $ 1.1    
Rich Data Corporation      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Ownership percentage after dilution   0.1314  
Secured Promissory Note 2.89%, Due 2024      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fair value of notes receivable     $ 1.1
Notes receivable, interest rate 2.89%