Debt - Term Loan - Additional Information (Detail) - Comerica syndicated credit facility, $50 million term loan [Member]	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Line of Credit Facility [Line Items]
Credit facility, expiration date	Aug. 28, 2017
Interest accrued percentage		3.17%
Base rate [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate description	Base rate advances bore interest at a defined base rate plus an applicable margin which varied from 1.50% to 2.25%, based on our ratio of total debt to EBITDA.
Base rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate above variable base rate	1.50%
Base rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate above variable base rate	2.25%
Eurodollar-based [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate description	which bear interest at 30, 60 or 90-day LIBOR rates plus an applicable margin which varied from 2.50% to 3.25%, based on our ratio of total debt to EBITDA.
Eurodollar-based [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest rate above variable base rate	2.50%
Eurodollar-based [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest rate above variable base rate	3.25%