Quarterly report pursuant to Section 13 or 15(d)

Bank and Other Borrowings - Additional Information (Details)

v3.21.1
Bank and Other Borrowings - Additional Information (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Apr. 15, 2021
USD ($)
Apr. 15, 2021
EUR (€)
Dec. 31, 2020
USD ($)
Bank and Other Borrowings [Line Items]          
Line of credit facility, maximum borrowing capacity $ 7,500,000       $ 7,700,000
Line of credit facility, used $ 4,400,000       $ 5,300,000
Interest variable rates 1.00%        
Weighted average interest rate 1.11%        
Interest expense $ 190,000 $ 218,000      
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 Incorporation | New General Unsecured Loan Agreement | Simest S.p.A. | Subsequent Event          
Bank and Other Borrowings [Line Items]          
Debt instrument face amount     $ 3,600,000 € 3,000,000.0