Certain Financial Statement Information - Schedule of Other income, net (Details) (USD $)	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Schedule of Other Income, Net
Impariment charge on non-marketable strategic investments	$ 0	[1]	$ 2,250,000	[1]	$ (7,147,000)	[1]
Impairment of notes receivable and other assets	0	[2]	(1,800,000)	[2]	0	[2]
Net gain (loss) on disposals of property	67,000		(21,000)		(10,000)
Other, net	287,000		1,677,000		300,000
Other income (expense), net	354,000		(2,394,000)		7,437,000
Notes receivable write-off			1,500,000
Asset impairment			$ 300,000

[1] During the fiscal years ended March 31, 2014, 2013 and 2012, the Company recognized an impairment charge of its non-marketable strategic investment of $0.0 million, $2.3 million and $1.0 million, respectively. Refer to Note 1, Summary of Significant Accounting Policies, to the Consolidated Financial Statements for details.

[2] During the fiscal year ended March 31, 2013, the Company wrote-off $1.5 million of notes receivable due from an investee and $0.3 million related to a prepaid intellectual property license from this investee. The Company also impaired the related equity investment of $2.3 million in this investee - see * above.