Annual report pursuant to Section 13 and 15(d)

Transactions with Related Parties - Additional Information (Details)

v3.20.4
Transactions with Related Parties - Additional Information (Details)
12 Months Ended
Aug. 31, 2020
USD ($)
Installment
Dec. 31, 2020
USD ($)
Installment
Dec. 31, 2019
USD ($)
Nov. 30, 2020
USD ($)
Jul. 02, 2020
USD ($)
Jun. 30, 2020
USD ($)
Nov. 30, 2019
USD ($)
Related Party Transaction [Line Items]              
Notes payable outstanding amount due   $ 7,500,000 $ 9,411,000        
Preferred Stock | Modification of 2018 Solutions Infini Purchase Agreement | Solutions Infini              
Related Party Transaction [Line Items]              
Number of installments | Installment 2            
Preference shares, performance bonuses $ 1,400,000     $ 883,000      
Studio Legale Chiomenti | Legal Services              
Related Party Transaction [Line Items]              
Cost incurred for related party services   363,000 694,000        
Directors and Executive Managers              
Related Party Transaction [Line Items]              
Loan reimbursement             $ 36,000
Interest income earned     600        
Executive Managers              
Related Party Transaction [Line Items]              
Outstanding obligation for preference shares   0 1,800,000        
Executive Managers | Modification of 2018 Solutions Infini Purchase Agreement | Solutions Infini              
Related Party Transaction [Line Items]              
Payment of bonus compensation $ 1,400,000 $ 3,500,000   $ 883,000      
Number of installments | Installment   2          
Executive Managers | Preferred Stock | Modification of 2018 Solutions Infini Purchase Agreement | Solutions Infini              
Related Party Transaction [Line Items]              
Preference shares, performance bonuses   $ 1,200,000          
Esse Effe and Maya              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due   7,500,000 7,500,000        
Maya              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due           $ 1,500,000  
Esse Effe S.p.A              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due     7,500,000   $ 6,000,000    
Sponsor and Gig Founders, LLC              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due     1,900,000     1,900,000  
Alessandra Levy | Kaleyra S.p.A              
Related Party Transaction [Line Items]              
Cost incurred for related party services   237,000 239,000        
Pietro Calogero | Kaleyra S.p.A              
Related Party Transaction [Line Items]              
Cost incurred for related party services   35,000 0        
Accrued Interest | Esse Effe and Maya              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due   $ 241,000 22,000        
Accrued Interest | Maya              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due           26,000  
Accrued Interest | Esse Effe S.p.A              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due     22,000   $ 105,000    
Accrued Interest | Sponsor and Gig Founders, LLC              
Related Party Transaction [Line Items]              
Notes payable outstanding amount due     $ 5,000     $ 33,000