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Commitments and Contingencies - Additional Information (Detail)
6 Months Ended
Jun. 30, 2014
EUR (€)
Jun. 30, 2014
Maximum [Member]
USD ($)
Jun. 30, 2014
Minimum [Member]
USD ($)
Commitments and Contingencies Disclosure [Line Items]      
Operating Leases, Rent Expense € 4,000us-gaap_LeaseAndRentalExpense    
Lessor Leasing Arrangements, Operating Leases, Term of Contract 5 years    
Operating Leases, Rent Expense, Net   2,563us-gaap_OperatingLeasesRentExpenseNet
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
2,277us-gaap_OperatingLeasesRentExpenseNet
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Operating Leases, Rent Expense, Minimum Rentals 5,100us-gaap_OperatingLeasesRentExpenseMinimumRentals    
Contractual Obligation, Due in Next Twelve Months € 428,000us-gaap_ContractualObligationDueInNextTwelveMonths