Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share Basic And Diluted [Abstract]
Net loss	$ (31,923)	$ (4,229)	$ (27,547)	$ (9,971)
Weighted-average shares used in per share calculation - basic and diluted	113,621	107,425	112,931	106,690
Net loss per share - basic and diluted	$ (0.28)	$ (0.04)	$ (0.24)	$ (0.09)