Long-term Debt - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012 SecurityLoan	Dec. 31, 2013	Nov. 08, 2011
Debt Disclosure [Abstract]
Maximum amount of the revolving credit facility			$ 40,000,000
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	5
Minimum amount required for LIBOR rate election	1,000,000
Long-term Debt		0
Amended Credit Agreement, available borrowing capacity		40,000,000
Minimum liquidity hurdle maintained for available borrowing capacity		$ 25,000,000