v2.4.0.8

Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Apr. 30, 2014
Estimated Useful Lives of Property Plant and Equipment | Depreciation and amortization is computed utilizing the straight-line method over the estimated useful lives of the related assets as follows:
Computer equipment |  | 3 years
Furniture and fixtures |  | 5 years
Office equipment |  | 5 years
Software |  | 3 years
Leasehold improvements |  | Shorter of estimated useful life or the lease term

X
- Definition Property Plant And Equipment Estimated Lives + References No definition available. + Details
Name: | bv_PropertyPlantAndEquipmentEstimatedLivesTableTextBlock
Namespace Prefix: | bv_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration