Senior Debt - Summary of Debt (Parenthetical) (Detail) - 12 months ended Dec. 31, 2015	USD ($)	EUR (€)
Debt Instrument [Line Items]
Outstanding borrowings under Euro denominated note payable to bank	$ 27,000
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Term loans, year of maturity	2016-01	2016-01
Interest rate	3.82%	3.82%
U S Dollar Euro [Member]
Debt Instrument [Line Items]
Outstanding borrowings under Euro denominated note payable to bank | €		€ 25,000
Term Loan [Member] | Debt Instrument, Redemption, through September 2017 [Member]
Debt Instrument [Line Items]
Outstanding borrowings under Euro denominated note payable to bank	$ 3,200,000
Term loans, year of maturity	2017-09	2017-09
Term Loan [Member] | Debt Instrument, Redemption, through September 2018 [Member]
Debt Instrument [Line Items]
Outstanding borrowings under Euro denominated note payable to bank	$ 4,300,000
Term loans, year of maturity	2018-09	2018-09
Term Loan [Member] | Debt Instrument, Redemption, through September 2020 [Member]
Debt Instrument [Line Items]
Outstanding borrowings under Euro denominated note payable to bank	$ 5,300,000
Term loans, year of maturity	2020-09	2020-09