Certain Financial Statement Information - Potentially Dilutive Common Shares (Details) - shares shares in Thousands	9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Certain Financial Statement Information [Line Items]
Dilutive securities excluded from the net loss per share computation	6,767	6,874
Outstanding stock options
Certain Financial Statement Information [Line Items]
Dilutive securities excluded from the net loss per share computation	1,650	1,882
Outstanding RSUs
Certain Financial Statement Information [Line Items]
Dilutive securities excluded from the net loss per share computation	4,752	4,642
ESPP shares
Certain Financial Statement Information [Line Items]
Dilutive securities excluded from the net loss per share computation	365	350