Balance sheet information - Intangibles, Other Assets and Accrued Expenses (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Balance Sheet Related Disclosures [Abstract]
Goodwill		$ 14,300		$ 14,300		$ 26,100
Goodwill reduction				11,800
Acquired developed technology		6,775		6,775		13,875
Less accumulated amortization		(6,775)		(6,775)		(12,494)
Intangible assets, net		0		0		1,381
Write-off of intangible assets	$ 945
Amortization of intangible assets		0	$ 218	436	$ 785
Other Assets
Deposits and other assets		1,040		1,040		956
Non-marketable equity investments		6,670		6,670		458
Warrant to purchase non-marketable equity investment units		448		448		0
Non-marketable equity investments accounted for under the equity method		19,846		19,846		0
Non-marketable debt investments		5,500		5,500		0
Total other assets		33,504		33,504		1,414
Accrued Expenses
Accrued compensation and benefits		13,477		13,477		13,288
Accrued royalties		10,599		10,599		21,604
Customer overpayments and related reserves		2,431		2,431		4,291
Other accrued expenses		9,701		9,701		9,716
Total accrued expenses		$ 36,208		$ 36,208		$ 48,899