Debt - Additional Information (Detail)	Nov. 08, 2011 USD ($) SecurityLoan	Dec. 31, 2015 USD ($)
Debt Disclosure [Abstract]
Maximum amount of the revolving credit facility	$ 40,000,000.0
Maturity date for the revolving credit facility	Sep. 03, 2015
Period for which LIBOR rate election for amount of debt made	1, 2 or 3 months at a time
Maximum number of individual LIBOR rate loan | SecurityLoan	5
Minimum amount required for LIBOR rate election	$ 1,000,000.0
Amended Credit Agreement, available borrowing capacity	40,000,000
Minimum liquidity hurdle maintained for available borrowing capacity	$ 25,000,000.0
Long-term debt		$ 0