Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (15,652)	$ (11,423)	$ (31,750)	$ (20,758)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	206	(661)	565	(595)
Available-for-sale securities:
Unrealized gain (loss) on available-for-sale securities, net of tax	(241)	(298)	(213)	(437)
Reclassification adjustments for gain (loss) on available-for-sale securities recognized, net of tax	6	(5)	6	(10)
Net increase (decrease) from available-for-sale securities, net of tax	(235)	(303)	(207)	(447)
Other comprehensive income (loss), net of tax	(29)	(964)	358	(1,042)
Comprehensive loss	$ (15,681)	$ (12,387)	$ (31,392)	$ (21,800)