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

Quarterly report pursuant to Section 13 or 15(d)

Business Combinations - Additional Information (Details)

Business Combinations - Additional Information (Details) $ / shares in Units, € in Millions									3 Months Ended			5 Months Ended	9 Months Ended
	Aug. 30, 2021 USD ($)	Jul. 08, 2021 USD ($)	Jul. 08, 2021 EUR (€)	Jul. 07, 2021 USD ($)	Jul. 07, 2021 EUR (€)	Jun. 01, 2021 USD ($) $ / shares shares	Feb. 18, 2021 USD ($) $ / shares shares	Nov. 25, 2019 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 01, 2021 USD ($) $ / shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Business Acquisition [Line Items]
Business combination transaction related costs								$ 13,100,000					$ 405,000
Net Income (loss)									$ (11,859,000)		$ (5,333,000)		(26,704,000)	$ (22,284,000)
Amortization of intangible assets										$ 4,200,000	406,000		$ 6,400,000	1,200,000
mGage
Business Acquisition [Line Items]
Acquisition date							Feb. 18, 2021						Feb. 18, 2021
Total purchase price consideration	$ 217,000,000.0					$ 218,000,000.0	$ 217,034,000					$ 218,000,000.0
Cash consideration	199,200,000					$ 198,600,000	$ 199,200,000
Working capital adjustment	$ 1,000,000.0								997,000				$ 997,000
Business combination, share price per share \| shares						1,600,000	1,600,000
Closing price of common stock in the date of issuance \| $ / shares						$ 11.77						$ 11.77
Closing price of common stock in the date of issuance						$ 18,800,000						$ 18,800,000
Business Acquisition description													The Company will continue to evaluate certain assets, liabilities and tax estimates that are subject to change within the measurement period (up to one year from the acquisition date).
Decrease in deferred tax liability									(1,900,000)
Increase in goodwill									5,900,000
Consolidated revenue									34,000,000.0				$ 44,100,000
Net Income (loss)									4,700,000				5,700,000
mGage \| Pro-forma
Business Acquisition [Line Items]
Consolidated revenue									34,000,000.0		33,200,000		98,600,000	102,900,000
Net Income (loss)									4,700,000		(2,600,000)		1,900,000	946,000
mGage \| General and Administrative Expenses
Business Acquisition [Line Items]
Business combination transaction related costs													$ 5,500,000
mGage \| Acquired Developed Technology
Business Acquisition [Line Items]
Decrease in intangible assets, net									(8,900,000)
mGage \| PIPE Subscription Agreements
Business Acquisition [Line Items]
Business combination, share price per share \| shares							8,400,000
Closing price of common stock in the date of issuance \| $ / shares							$ 12.50
Closing price of common stock in the date of issuance							$ 200,000,000
Bandyer
Business Acquisition [Line Items]
Total purchase price consideration		$ 15,391,000
Cash consideration		$ 13,300,000	€ 11.5	$ 15,400,000	€ 13.0
Business Acquisition description													The Company will continue to evaluate certain assets, liabilities and tax estimates that are subject to change within the measurement period (up to one year from the acquisition date)
Bandyer \| Pro-forma
Business Acquisition [Line Items]
Consolidated revenue									482,000		314,000		$ 1,200,000	801,000
Net Income (loss)									15,000		(260,000)		(892,000)	(712,000)
MGage and Bandyer \| Pro-forma
Business Acquisition [Line Items]
Amortization of intangible assets									0		2,900,000		4,900,000	8,700,000
Amortization of intangible assets, net of related tax effect											1,100,000	$ 0	1,800,000	3,200,000
Financial expenses									$ 0		$ 3,600,000		$ 5,900,000	$ 10,600,000