Quarterly report pursuant to Section 13 or 15(d)

Description of Organization and Business Operations - Schedule of Aggregate Closing Consideration for Redemption Range (Parenthetical) (Details)

v3.19.2
Description of Organization and Business Operations - Schedule of Aggregate Closing Consideration for Redemption Range (Parenthetical) (Details)
9 Months Ended
Jun. 30, 2019
Redemption Percentage is equal to or greater than 87.5% | Minimum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Redemption Percentage is greater than 75.0% but less than 87.5% | Minimum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Redemption Percentage is greater than 75.0% but less than 87.5% | Maximum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Redemption Percentage is greater than 62.5% but less than or equal to 75.0% | Minimum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Redemption Percentage is greater than 62.5% but less than or equal to 75.0% | Maximum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Redemption Percentage is equal to or greater than 50.0% but less than or equal to 62.5% | Minimum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Redemption Percentage is equal to or greater than 50.0% but less than or equal to 62.5% | Maximum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Redemption Percentage is less than 50.0% | Maximum  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%