Annual report pursuant to Section 13 and 15(d)

Debt for Forward Share Purchase Agreements - Additional Information (Details)

v3.20.4
Debt for Forward Share Purchase Agreements - Additional Information (Details) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended
Mar. 15, 2021
Feb. 25, 2021
Dec. 11, 2020
Aug. 30, 2020
Jul. 21, 2020
Jul. 18, 2020
Jun. 04, 2020
May 20, 2020
May 19, 2020
May 11, 2020
May 09, 2020
May 07, 2020
Apr. 07, 2020
Feb. 21, 2020
Feb. 20, 2020
Feb. 07, 2020
Dec. 13, 2019
Nov. 25, 2019
Nov. 19, 2019
Oct. 31, 2019
Oct. 01, 2019
Mar. 02, 2021
Dec. 31, 2019
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
May 18, 2020
Jan. 23, 2020
Jan. 07, 2020
Debt Instrument [Line Items]                                                          
Financial expense                                                 $ (1,475,000) $ (439,000)      
Open Market | Yakira Capital Management Inc | Kaleyra Incorporation                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                                 $ 11.00        
Business combination, shares acquired                                                 219        
Forward Share Purchase Agreement                                                          
Debt Instrument [Line Items]                                                          
Debt Instrument, carrying amount                                                 $ 483,000        
Accrued interest                                                 659,000        
Forward Share Purchase Agreement | Greenhaven                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price       $ 11.70                   $ 11.00 $ 11.00                            
Business combination, shares acquired       700,000                                                  
Business combination payment for stock purchased                             $ 152,000                            
Business combination payment for number of stock purchased                             60,996                            
Business combination, payment for aggregate difference of sale price per share and share price                                               $ 832,000          
Forward Share Purchase Agreement | Greenhaven | Common Stock                                                          
Debt Instrument [Line Items]                                                          
Repurchases of common stock, shares                             235,169                            
Repurchases of common stock, value                             $ 2,600,000                            
Forward Share Purchase Agreement | Greenhaven | Maximum                                                          
Debt Instrument [Line Items]                                                          
Business combination, shares acquired                           248,963                              
Forward Share Purchase Agreement | Greenhaven Road Capital Fund1 L P                                                          
Debt Instrument [Line Items]                                                          
Debt Instrument, carrying amount           $ 7,000,000.0                                     0        
Business combination, share price           $ 11.70                                              
Business combination, shares acquired       100,000                                                  
Business combination payment for stock purchased         $ 7,000,000.0                                                
Business combination, payment for aggregate difference of sale price per share and share price                                               $ 832,000          
Closing of business combination share consideration         100,000 539,548                                              
Business combination, purchase price           $ 6,200,000                                              
Forward Share Purchase Agreement | Kepos Alpha Fund L.P.                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price               $ 10.92         $ 10.92                                
Business combination, shares acquired                                         3,750,000                
Closing of business combination share consideration               25,098         50,000                                
Business combination, purchase price               $ 274,000         $ 546,000                           $ 706,000    
Percentage of increase in share purchase price                       1.00%                                  
Forward Share Purchase Agreement | Yakira Capital Management Inc                                                          
Debt Instrument [Line Items]                                                          
Debt Instrument, carrying amount                                                 $ 483,000        
Business combination, share price                   $ 10.6819                                      
Closing of business combination share consideration                   1,084,150                                      
Business combination, purchase price                   $ 11,600,000                                      
Deposited in escrow account                   $ 4,000                                      
Forward Share Purchase Agreement | Yakira Capital Management Inc | Yakira Rights Shares                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                     $ 1.05                    
Closing of business combination share consideration                                     439,299                    
Purchase price per share                                     $ 10.50                    
Forward Share Purchase Agreement | Yakira Capital Management Inc | Yakira Shares                                                          
Debt Instrument [Line Items]                                                          
Sale of stock price per unit                                     $ 10.5019                    
Closing of business combination share consideration                                     1,084,150                    
Sale of stock description                                                 Yakira had the right to sell the Yakira Shares between the four-month anniversary and six-month anniversary of the Business Combination Date to the Company for a per share price (the “Yakira Shares Purchase Price”) equal to (a) $10.5019, plus (b) $0.03 per share for each month (prorated for a partial month) following the Business Combination Date that Yakira has held the Yakira Shares.        
Sale of stock basis spread per month on price per share                                     $ 0.03                    
Deposited in escrow account                                     $ 11,600,000                    
Forward Share Purchase Agreement | Yakira Capital Management Inc | Minimum | Yakira Shares                                                          
Debt Instrument [Line Items]                                                          
Sale of stock price per unit                                     $ 10.50                    
Forward Share Purchase Agreement | Glazer Capital, LLC                                                          
Debt Instrument [Line Items]                                                          
Debt Instrument, carrying amount                                             $ 9,300,000     $ 9,300,000      
Business combination, share price                                     $ 10.6819                    
Closing of business combination share consideration                                             53,040            
Business combination, shares issued description                                                 Glazer shall notify the Company in writing five business days prior to the six month anniversary of the Business Combination Date if it is not exercising its right to sell the Glazer Shares to the Company; otherwise, absent written notification to the contrary, Glazer shall be deemed to have exercised its right to sell all of its Glazer Shares to the Company. The Company will purchase the Glazer Shares from Glazer on the six-month anniversary of the closing of the Business Combination (the “Glazer Shares Closing Date”). As of the Business Combination Date, Glazer held 922,933 shares of common stock.        
Business combination of closing period                                     6 months                    
Business combination, deposited in to escrow account                                     $ 9,858,678                    
Business combination of sale business days                                     3 days                    
Forward Share Purchase Agreement | Glazer Capital, LLC | Letter of Credit                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                 $ 10.6819                                        
Closing of business combination share consideration                 864,093                                        
Business combination, purchase price                 $ 9,200,000                                        
Forward Share Purchase Agreement | Glazer Capital, LLC | Letter of Credit and Reimbursement Agreement                                                          
Debt Instrument [Line Items]                                                          
Agreement collateral amount                                                         $ 9,300,000
Forward Share Purchase Agreement | Glazer Capital, LLC | Common Stock                                                          
Debt Instrument [Line Items]                                                          
Closing of business combination share consideration                                     922,933                    
Forward Share Purchase Agreement | Yakira                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                       $ 10.50                  
Prepayment amount transferred to NGFP                                   $ 17,000,000.0                      
Number of days notice required for termination of agreement                                       10 days                  
Debt instrument interest rate percentage before original valuation date                                       2.75%                  
Debt instrument interest rate percentage after original valuation date             3.50%                         3.50%                  
Debt instrument extended valuation date             Nov. 25, 2021                                            
Financial expense                                                 $ 611,000        
Forward Share Purchase Agreement | Yakira | Kaleyra Incorporation                                                          
Debt Instrument [Line Items]                                                          
Prepayment amount transferred                                                 17,000,000.0        
Forward Share Purchase Agreement | Yakira | Other Current Liabilities                                                          
Debt Instrument [Line Items]                                                          
Accrued interest                                                 $ 659,000        
Forward Share Purchase Agreement | Yakira | Subsequent Event | Kaleyra Incorporation                                                          
Debt Instrument [Line Items]                                                          
Prepayment amount transferred   $ 17,000,000.0                                                      
Business combination contingent consideration liability except accrued interest payable.   $ 0                                                      
Forward Share Purchase Agreement | Yakira | Common Stock                                                          
Debt Instrument [Line Items]                                                          
Business acquisition number of shares held                                       1,623,000                  
Forward Share Purchase Agreement | Yakira | Maximum | Common Stock                                                          
Debt Instrument [Line Items]                                                          
Closing of business combination share consideration                                       2,000,000                  
Forward Share Purchase Agreement | Open Market | Subsequent Event                                                          
Debt Instrument [Line Items]                                                          
Business combination, shares acquired                                           43,930              
Forward Share Purchase Agreement | Open Market | Greenhaven                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                                       $ 11.70  
Business combination, shares acquired                                               160,452          
Number of days notice required for sale of shares under minimum block size condition                                 3 days                        
Exercise price of warrants, description                                                 In the event that Greenhaven sells any shares (including any Additional Shares), at a sale price of less than $10.50, and provided that Greenhaven meets the Minimum Block Size Condition, it shall provide notice to the Company within three (3) Business Days of such sale, and such notice shall include the date of the sale, the number of shares sold, and confirmation that the sale price per share was greater than $8.50, and the Company shall pay Greenhaven in accordance with Greenhaven’s written instructions an amount equal to (x) the number of shares (including any Additional Shares) sold multiplied by (y) the amount by which $10.50 exceeds the sale price per share. Furthermore, the parties agreed that nothing in the Greenhaven Purchase Agreement shall prohibit Greenhaven from entering into a contract to purchase and/or sell warrants of Kaleyra, Inc.        
Sale of stock price per unit                                                       $ 8.50  
Forward Share Purchase Agreement | Open Market | Greenhaven | Minimum                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.50                        
Number of additional rights acquired under minimum block size condition                                 25,000                        
Exercise price of warrants under minimum block size condition                                 $ 8.50                        
Forward Share Purchase Agreement | Open Market | Kepos Alpha Fund L.P.                                                          
Debt Instrument [Line Items]                                                          
Number of days notice required for sale of shares under minimum block size condition                                 3 days                        
Exercise price of warrants, description                                                 In the event that KAF sells any shares (including any Additional Shares), at a sale price of less than $10.50, and provided that KAF meets the Minimum Block Size Condition, it shall provide notice to the Company within three (3) Business Days of such sale, and such notice shall include the date of the sale, the number of shares sold, and confirmation that the sale price per share was greater than $8.50, and the Company shall pay KAF in accordance with KAF’s written instructions an amount equal to (x) the number of shares (including any Additional Shares) sold multiplied by (y) the amount by which $10.50 exceeds the sale  price per share. Furthermore, the parties agreed that nothing in the KAF Purchase Agreement shall prohibit KAF from entering into a contract to purchase and/or sell warrants of the Company.        
Sale of stock price per unit                         $ 7.00                                
Business combination, purchase price                                                     $ 431,000    
Forward Share Purchase Agreement | Open Market | Kepos Alpha Fund L.P. | Minimum                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.50                        
Exercise price of warrants under minimum block size condition                                 $ 8.50                        
Sale of stock price per unit                                                     $ 7.00    
Forward Share Purchase Agreement | Open Market | Third Yakira Amendment | Subsequent Event                                                          
Debt Instrument [Line Items]                                                          
Business combination, shares acquired 219                                                        
Forward Share Purchase Agreement | Open Market | Third Yakira Amendment | Minimum | Subsequent Event                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price $ 11.00                                                        
Forward Share Purchase Agreement | Open Market | Glazer Capital, LLC                                                          
Debt Instrument [Line Items]                                                          
Number of days notice required for sale of shares under minimum block size condition                                 3 days                        
Exercise price of warrants, description                                                 Glazer shall give written notice to the Company of any sale of shares (including any Additional Shares) within three (3) Business Days following the date of such sale, and such notice shall include the date of the sale, the number of shares sold, and confirmation that the sale price per share was greater than $10.50 per share (or greater than $8.50 per share provided that Glazer meets the Minimum Block Size Condition) prior to the payment of any commissions due by Glazer for the sale.        
Forward Share Purchase Agreement | Open Market | Glazer Capital, LLC | Minimum                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.50                        
Exercise price of warrants under minimum block size condition                                 8.50                        
Forward Share Purchase Agreements, First right                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 11.00                        
Business combination, shares acquired                                 196,195                        
Forward Share Purchase Agreements, Second Right                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.70                        
Business combination, shares acquired                                 250,000                        
Forward Share Purchase Agreements, Third Right                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.50                        
Business combination, shares acquired                                 550,000                        
Forward Share Purchase Agreements, First Right Additional Purchase | Kepos Alpha Fund L.P.                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.70                        
Business combination, shares acquired                                 102,171                        
Forward Share Purchase Agreements, Second Right Additional Purchase | Kepos Alpha Fund L.P.                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                                 $ 10.50                        
Business combination, shares acquired                                 93,676                        
Forward Share Purchase Agreement Fourth Right | Kepos Alpha Fund L.P.                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                       $ 10.92                                  
Business combination, shares acquired                       46,137 46,137                                
Forward Share Purchase Agreement Fifth Right | Kepos Alpha Fund L.P.                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                       $ 10.82 $ 10.82                                
Business combination, shares acquired                       93,676 93,676                                
Forward Share Purchase Agreement Sixth Right | Kepos Alpha Fund L.P. | Maximum                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                         $ 10.92                                
Yakira First Amended Purchase Agreement | Yakira Capital Management Inc | Yakira Rights Shares                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price                               $ 10.93     $ 10.50                    
Business combination, number of shares expected to be purchase                               43,930                          
Yakira Second Amended Purchase Agreement | Yakira Capital Management Inc                                                          
Debt Instrument [Line Items]                                                          
Number of rights shares to be purchased                     43,930                                    
Third Yakira Amendment | Yakira Capital Management Inc | Yakira Rights Shares                                                          
Debt Instrument [Line Items]                                                          
Business combination, share price     $ 11.00                         $ 10.93                          
Business combination, number of shares expected to be purchase     43,930