Property and Equipment, Net (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Property, Plant and Equipment [Line Items]
Depreciation, including accelerated depreciation related to restructuring reserve	$ 2.7	$ 9.0	$ 3.9
Purchased for Internal-Use Software [Member]
Property, Plant and Equipment [Line Items]
Amortization of capitalized software	$ 2.2	$ 2.5	$ 3.9