Certain Financial Statement Information Net Income/Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Schedule of Reconciliation of Shares Used to Calculate Basic and Diluted Net (Loss) Income Per Share
Net loss	$ (12,131)	$ (7,284)	$ (36,913)	$ (28,810)
Shares used in net loss per share computation:
Weighted average common shares outstanding, basic (shares)	78,920	73,989	78,442	71,986
Net effect of dilutive common share equivalents (shares)	0	0	0	0
Weighted average common shares outstanding, diluted (shares)	78,920	73,989	78,442	71,986
Basic and diluted net loss per share (in Dollars per share)	$ (0.15)	$ (0.10)	$ (0.47)	$ (0.40)