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, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share Diluted [Line Items]
Net loss	$ 7,199	$ (31,923)	$ (1,866)	$ (27,547)
Weighted-average shares used in per share calculation - basic	117,544	113,621	117,456	112,931
Weighted-average shares used in per share calculation - diluted	119,544	113,621	117,456	112,931
Net income (loss) per share - basic	$ 0.06	$ (0.28)	$ (0.02)	$ (0.24)
Net income (loss) per share - diluted	$ 0.06	$ (0.28)	$ (0.02)	$ (0.24)
Options to purchase common stock
Earnings Per Share Diluted [Line Items]
Effect of potentially dilutive shares	657
Restricted Stock Units
Earnings Per Share Diluted [Line Items]
Effect of potentially dilutive shares	1,129
Employee Stock Purchase Plan shares
Earnings Per Share Diluted [Line Items]
Effect of potentially dilutive shares	214