Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net loss	$ (8,517)	$ (31,884)	$ (71,643)
Weighted-average shares used in per share calculation - basic and diluted	108,273	103,074	99,000
Net loss per share - basic and diluted	$ (0.08)	$ (0.31)	$ (0.72)