Debt - Additional Information (Detail)	1 Months Ended	9 Months Ended
	Oct. 25, 2013	Sep. 30, 2015 USD ($)	Feb. 15, 2013 USD ($)
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility			$ 40,000,000
Fees and expenses relating to creation of PNC facility			44,000
Borrowings outstanding under PNC facility		$ 18,600,000
Available borrowing under PNC facility		$ 14,200,000
PNC Facility effective rate of interest		3.75%
Debt Instrument, Maturity Date		Jun. 30, 2018
Line of Credit Facility, Interest Rate Description		Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to Domestic Rate Loans (as defined in the PNC Facility), the sum of the Alternate Base Rate (as defined in the PNC Facility) plus one half of one percent (.50%) and (B) with respect to Eurodollar Rate Loans, the sum of the Eurodollar Rate plus two and one quarter of one percent( 2.25%).
Minimum
Debt Disclosure [Line Items]
Fixed charge coverage ratio	1.00	1.00
Maximum
Debt Disclosure [Line Items]
Fixed charge coverage ratio	1.10	1.10
Term Loan
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility			4,000,000
Term Loan | Second Amendment
Debt Disclosure [Line Items]
Line of Credit Facility, Interest Rate Description		“Term Loan Rate” shall mean an interest rate per annum equal to (a) the sum of the Alternate Base Rate plus one percent (1.00%) with respect to the Domestic Rate Loans and (b) the sum of the Eurodollar Rate plus two and three quarters of one percent (2.75%) with respect to Eurodollar Rate Loans.
Term Loan | Fourth Amendment
Debt Disclosure [Line Items]
Line of Credit Facility, Interest Rate Description		Term Loan Rate shall mean an interest rate per annum equal to (a) the sum of the Alternate Base Rate plus one half of one percent (.50%) with respect to the Domestic Rate Loans and (b) the sum of the Eurodollar Rate plus two and one quarter of one percent (2.25%) with respect to Eurodollar Rate Loans.
Term Loan | Base Rate | Second Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Base Rate plus one percent
Term Loan | Base Rate | Fourth Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Base Rate plus one half of one percent
Term Loan | Eurodollar | Second Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Eurodollar Rate plus two and three quarters of one percent
Term Loan | Eurodollar | Fourth Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Eurodollar Rate plus two and one quarter of one percent
Revolving Credit Facility
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility			$ 36,000,000
Revolving Credit Facility | Second Amendment
Debt Disclosure [Line Items]
Line of Credit Facility, Interest Rate Description		“Revolving Interest Rate” shall mean an interest rate per annum equal to (a) the sum of the Alternate Base Rate (as defined in the PNC Facility) plus one percent (1.00%) with respect to Domestic Rate Loans and (b) the sum of the Eurodollar Rate plus two and three quarters of one percent (2.75%) with respect to the Eurodollar Rate Loans.
Revolving Credit Facility | Fourth Amendment
Debt Disclosure [Line Items]
Line of Credit Facility, Interest Rate Description		Revolving Interest Rate shall mean an interest rate per annum equal to (a) the sum of the Alternate Base Rate (as defined in the PNC Facility) plus one half of one percent (.50%) with respect to Domestic Rate Loans and (b) the sum of the Eurodollar Rate plus two and one quarter of one percent (2.25%) with respect to the Eurodollar Rate Loans.
Revolving Credit Facility | Base Rate | Second Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Base Rate (as defined in the PNC Facility) plus one percent
Revolving Credit Facility | Base Rate | Fourth Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Base Rate (as defined in the PNC Facility) plus one half of one percent
Revolving Credit Facility | Eurodollar | Second Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Eurodollar Rate plus two and three quarters of one percent
Revolving Credit Facility | Eurodollar | Fourth Amendment
Debt Disclosure [Line Items]
Debt instrument, description of variable rate basis		Eurodollar Rate plus two and one quarter of one percent