Summary of Significant Accounting Policies - Average Useful Lives for Property (Detail)	12 Months Ended
	Mar. 31, 2014
Leasehold Improvements
Property Plant And Equipment [Line Items]
Useful lives of property	10 years
Minimum | Machinery and Equipment
Property Plant And Equipment [Line Items]
Useful lives of property	3 years
Minimum | Furniture and Fixtures
Property Plant And Equipment [Line Items]
Useful lives of property	3 years
Minimum | Computer Hardware and Software
Property Plant And Equipment [Line Items]
Useful lives of property	3 years
Maximum | Machinery and Equipment
Property Plant And Equipment [Line Items]
Useful lives of property	10 years
Maximum | Furniture and Fixtures
Property Plant And Equipment [Line Items]
Useful lives of property	10 years
Maximum | Computer Hardware and Software
Property Plant And Equipment [Line Items]
Useful lives of property	5 years