Quarterly report pursuant to Section 13 or 15(d)

Bank and Other Borrowings - Additional Information (Details)

v3.20.1
Bank and Other Borrowings - Additional Information (Details)
3 Months Ended
Mar. 31, 2020
USD ($)
Mar. 20, 2020
USD ($)
Mar. 11, 2020
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Mar. 20, 2020
EUR (€)
Mar. 11, 2020
EUR (€)
Jan. 23, 2020
USD ($)
Dec. 31, 2019
USD ($)
Bank And Other Borrowings [Line Items]                  
Line of credit facility, maximum borrowing capacity $ 6,600,000     $ 6,600,000         $ 5,600,000
Line of credit facility, used $ 5,300,000     $ 5,300,000         $ 3,600,000
Interest variable rates       1.00%          
Weighted average interest rate 1.22%     1.22%          
Interest expense       $ 218,000 $ 90,000        
Minimum                  
Bank And Other Borrowings [Line Items]                  
Interest variable rates       0.60%          
Maximum                  
Bank And Other Borrowings [Line Items]                  
Interest variable rates       7.60%          
Kaleyra S.p.A | Intesa SanPaolo S.p.A.                  
Bank And Other Borrowings [Line Items]                  
Deferment of debt repayments beyond December 31, 2020 $ 404,000                
Kaleyra S.p.A | Monte dei Paschi di Siena S.p.A. | Unsecured Loan Agreement                  
Bank And Other Borrowings [Line Items]                  
Debt instrument, term     36 months            
Debt instrument face amount     $ 2,200,000       € 2,000,000.0    
Interest rate     1.50%       1.50%    
Kaleyra S.p.A | Banco Popolare di Milano S.p.A. | BPM Loan Agreement                  
Bank And Other Borrowings [Line Items]                  
Interest variable rates   3.00%              
Debt instrument, term   45 months              
Debt instrument face amount   $ 6,500,000       € 6,000,000.0      
Description of variable rate   three-month Euribor plus a spread of 3.00%.              
Frequency of periodic repayment   15 quarterly installments              
Revolving Credit Facility | Intesa SanPaolo S.p.A.                  
Bank And Other Borrowings [Line Items]                  
Line of credit facility, used $ 950,000     $ 950,000          
Weighted average interest rate 1.52%     1.52%          
Revolving Credit Facility | Buc Mobile                  
Bank And Other Borrowings [Line Items]                  
Line of credit facility, maximum borrowing capacity $ 1,000,000.0     $ 1,000,000.0          
Revolving Credit Facility | Buc Mobile | Intesa SanPaolo S.p.A.                  
Bank And Other Borrowings [Line Items]                  
Line of credit facility, maximum borrowing capacity               $ 1,000,000  
New Financing | Kaleyra S.p.A | Banco Popolare di Milano S.p.A. | BPM Loan Agreement                  
Bank And Other Borrowings [Line Items]                  
Debt instrument face amount   $ 2,700,000