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Summary of Significant Accounting Policies - Summary of estimated useful lives of the assets (Details 6)
12 Months Ended
Mar. 31, 2013
Automobiles
 
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, estimated useful lives 3 years
Equipment
 
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, estimated useful lives 5 years
Furniture and fixtures
 
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, estimated useful lives 7 years
Leasehold improvements
 
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, estimated useful lives Lesser of lease term or useful life (generally 6-7 years)