Kaleyra, Inc. Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Net Realized and Unrealized (Gains) and Losses Included in Income Related to Level 3 Liabilities (Details) - Level 3 - Preference Shares - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net Realized and Unrealized (Gains) Losses Included in Income	$ (2,486)	$ 315
Research and Development
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net Realized and Unrealized (Gains) Losses Included in Income	(941)	117
Sales and Marketing
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net Realized and Unrealized (Gains) Losses Included in Income	(372)	46
General and Administrative
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net Realized and Unrealized (Gains) Losses Included in Income	(756)	94
Financial Income (Expense), Net
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net Realized and Unrealized (Gains) Losses Included in Income	$ (417)	$ 58