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Waltham and Lexington Lease Arrangements (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Real Estate Properties [Line Items]        
Operating Leases, Rent Expense $ 4,087us-gaap_LeaseAndRentalExpense $ 3,727us-gaap_LeaseAndRentalExpense $ 12,886us-gaap_LeaseAndRentalExpense $ 10,122us-gaap_LeaseAndRentalExpense
Waltham Lease [Member]        
Real Estate Properties [Line Items]        
Operating Leases, Rent Expense, Minimum Rentals     131,769us-gaap_OperatingLeasesRentExpenseMinimumRentals
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vprt_WalthamLeaseMember		  
Construction in Progress, Gross 73,167us-gaap_ConstructionInProgressGross
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vprt_WalthamLeaseMember		   73,167us-gaap_ConstructionInProgressGross
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vprt_WalthamLeaseMember		  
Operating Leases, Rent Expense $ 375us-gaap_LeaseAndRentalExpense
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vprt_WalthamLeaseMember		   $ 1,125us-gaap_LeaseAndRentalExpense
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= vprt_WalthamLeaseMember