Segment Information (Narrative) (Details)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Revenue, Major Customer and Geographic Information [Line Items]
Entity Wide Revenue By Major Customer Percent Of Revenue Did Not Exceed Ten Percent	10.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | GameStop Corp [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Entity Wide Revenue By Major Customer Percent Of Revenue	13.00%	13.00%	15.00%
United States [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Entity's Country of Domicile	99.00%
Switzerland [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Disclosure on Geographic Areas, Basis for Attributing Revenue to Countries	1171	885	589
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage	33.00%	23.00%	14.00%