Certain Financial Statement Information Net Income/Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Schedule of Reconciliation of Shares Used to Calculate Basic and Diluted Net (Loss) Income Per Share
Net loss	$ (11,717)	$ (32,383)	$ (24,782)	$ (21,526)
Shares used in net loss per share computation:
Weighted average common shares outstanding, basic (shares)	78,487	72,610	78,202	70,985
Net effect of dilutive common share equivalents (shares)	0	0	0	0
Weighted average common shares outstanding, diluted (shares)	78,487	72,610	78,202	70,985
Basic and diluted net loss per share (in Dollars per share)	$ (0.15)	$ (0.45)	$ (0.32)	$ (0.30)