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Balance sheet information - Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Acquired developed technology		$ 6,775	$ 13,875
Less accumulated amortization		(6,775)	(12,494)
Intangible assets, net		0	1,381
Write-off of intangible assets	$ 945
Amortization expense for intangibles		436	1,000	$ 1,100
Goodwill [Roll Forward]
Impairment		0	0	$ (2,666)
Goodwill		14,300
Automotive
Goodwill [Roll Forward]
Goodwill		14,320
Allocated to Sale of Assets		(65)
Impairment		0
Goodwill		$ 14,255	$ 14,320
Grab Holdings Inc.
Goodwill [Roll Forward]
Goodwill related to disposal group	$ 65