Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

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Debt - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 24, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, proceeds from borrowings         $ 7,000  
Borrowings under revolving credit facility   3,000   3,000   3,000
Interest expense including amortization of deferred financing fees   128 71 255 108  
City National Bank
            
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, borrowing capacity 15,000          
Credit facility, proceeds from borrowings 7,000          
Borrowings under revolving credit facility   3,000   3,000   3,000
Interest expense including amortization of deferred financing fees   37 2 74 2  
Interest on principal amount   3.75%   3.75%    
City National Bank | Delayed Draw Term Loan
            
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, borrowing capacity 7,500          
Credit facility maturity date Jun. 24, 2020          
Credit facility, interest rate description       The higher of the prime rate plus a margin of 0.05 percentage points and 2.5% or (b) the LIBOR rate plus 3 percentage points, at the borrowers’ option    
Credit facility, number of installments 20          
Credit facility, frequency of installments Quarterly          
City National Bank | Delayed Draw Term Loan | Option One | Maximum
            
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, spread on variable rate 0.05%          
Credit facility, variable interest rate basis Prime rate          
City National Bank | Delayed Draw Term Loan | Option One | Minimum
            
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, fixed interest rate 2.50%          
City National Bank | Delayed Draw Term Loan | Option Two
            
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, spread on variable rate 3.00%          
Credit facility, variable interest rate basis LIBOR          
City National Bank | Borrowings Under Revolving Credit Agreement
            
Schedule Of Maturities Of Long Term Debt [Line Items]            
Credit facility, borrowing capacity $ 7,500          
Credit facility maturity date Dec. 24, 2016          
Debt covenant, restriction on change in control 30.00%