Commitments and Contingencies - Operating Leases, Long-Term Debt and Royalty Agreement (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Aug. 07, 2017
Operating Lease Agreements and Long-term Debt
Rent expense	$ 8,600	$ 8,300	$ 8,000
Future minimum lease payments under non-cancelable operating lease agreements
2018		9,290
2019		7,569
2020		6,844
2021		6,062
2022		6,093
Thereafter		12,642
Total		48,500
Long-term principal and interest on Convertible Notes
2018		47,597
2019		6,827
2020		6,828
2021		6,828
2022		58,827
Thereafter		85,266
Total		212,173
License agreement | WARF (Wisconsin Alumni Research Foundation)
License and Royalty Agreements
Royalty costs	500	600	$ 600
Royalty amount accrued	200	$ 200
License agreement | WARF (Wisconsin Alumni Research Foundation) | Minimum
License and Royalty Agreements
Annual commitment amount	$ 300
Existing 3.50% Convertible Notes
Operating Lease Agreements and Long-term Debt
Interest rate (as a percent)	3.50%			3.50%