Balance sheet information - Intangibles and Other Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Goodwill	$ 31,300		$ 31,300		$ 31,300
Acquired developed technology	13,875		13,875		13,875
Less accumulated amortization	(9,986)		(9,986)		(9,210)
Intangible assets, net	3,889		3,889		4,665
Amortization of Intangible Assets	258	$ 307	776	$ 1,300
Accrued Liabilities, Current [Abstract]
Accrued compensation and benefits	8,478		8,478		9,308
Accrued royalties	17,854		17,854		15,331
Accrued legal settlement and contingencies	0		0		1,576
Other accrued expenses	8,981		8,981		10,059
Accrued expenses	35,313		35,313		$ 36,274
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2017	255		255
2018	1,000		1,000
2019	1,000		1,000
2020	1,000		1,000
2021	$ 592		$ 592