Quarterly report pursuant to Section 13 or 15(d)

Description of Organization and Business Operations - Summary of Aggregate Number of Earnout Shares Entitle to Receive by Sellers (Parenthetical) (Details)

v3.19.2
Description of Organization and Business Operations - Summary of Aggregate Number of Earnout Shares Entitle to Receive by Sellers (Parenthetical) (Details)
9 Months Ended
Jun. 30, 2019
Maximum | Redemption Percentage, Less than 50.00%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Maximum | Redemption Percentage, Equal to or greater than 50.00% but less than or equal to 62.50%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Maximum | Redemption Percentage, Greater than 62.50% but less than or equal to 75.00%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Maximum | Redemption Percentage, Greater than 75.00% but less than 87.50%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Maximum | Aggregate 2019 Earnout Shares | Redemption Percentage, Less than 50.00% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Maximum | Aggregate 2019 Earnout Shares | Redemption Percentage, Equal to or greater than 50.00% but less than or equal to 62.50% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Maximum | Aggregate 2019 Earnout Shares | Redemption Percentage, Greater than 62.50% but less than or equal to 75.00% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Maximum | Aggregate 2019 Earnout Shares | Redemption Percentage, Greater than 75.00% but less than 87.50% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Maximum | Aggregate 2020 Earnout Shares | Redemption Percentage, Less than 50.00% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Maximum | Aggregate 2020 Earnout Shares | Redemption Percentage, Equal to or greater than 50.00% but less than or equal to 62.50% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Maximum | Aggregate 2020 Earnout Shares | Redemption Percentage, Greater than 62.50% but less than or equal to 75.00% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Maximum | Aggregate 2020 Earnout Shares | Redemption Percentage, Greater than 75.00% but less than 87.50% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Minimum | Redemption Percentage, Equal to or greater than 50.00% but less than or equal to 62.50%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Minimum | Redemption Percentage, Greater than 62.50% but less than or equal to 75.00%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Minimum | Redemption Percentage, Greater than 75.00% but less than 87.50%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Minimum | Redemption Percentage, Equal to or greater than 87.50%  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Minimum | Aggregate 2019 Earnout Shares | Redemption Percentage, Equal to or greater than 50.00% but less than or equal to 62.50% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Minimum | Aggregate 2019 Earnout Shares | Redemption Percentage, Greater than 62.50% but less than or equal to 75.00% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Minimum | Aggregate 2019 Earnout Shares | Redemption Percentage, Greater than 75.00% but less than 87.50% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Minimum | Aggregate 2019 Earnout Shares | Redemption Percentage, Equal to or greater than 87.50% | Earnout Shares, milestone 1 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%
Minimum | Aggregate 2020 Earnout Shares | Redemption Percentage, Equal to or greater than 50.00% but less than or equal to 62.50% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 50.00%
Minimum | Aggregate 2020 Earnout Shares | Redemption Percentage, Greater than 62.50% but less than or equal to 75.00% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 62.50%
Minimum | Aggregate 2020 Earnout Shares | Redemption Percentage, Greater than 75.00% but less than 87.50% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 75.00%
Minimum | Aggregate 2020 Earnout Shares | Redemption Percentage, Equal to or greater than 87.50% | Earnout Shares, milestone 2 | Kaleyra  
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]  
Redemption Percentage 87.50%