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Notes Payable - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Nov. 30, 2013
Line Of Credit Facility [Line Items]            
Revolving credit agreement amendment date     Nov. 12, 2014      
Revolving Credit Facility One
            
Line Of Credit Facility [Line Items]            
Revolving credit line           $ 10,000,000
Revolving credit agreement maturity date     Oct. 01, 2015      
Credit facility's interest rate, description     interest was capitalized at the 30 day LIBOR rate plus 3.25% per annum      
Borrowed under the agreement 500,000   500,000   500,000  
Additional borrowings available based on the Company's borrowing 5,700,000   5,700,000   7,900,000  
Interest capitalized 0 0 18,000 0    
Revolving Credit Facility One | Minimum
            
Line Of Credit Facility [Line Items]            
Leverage test of total liabilities to total net worth 1.00   1.00      
Fixed Charge Coverage Ratio 1.25   1.25      
Net income per quarter     1.00      
Revolving Credit Facility One | London Interbank Offered Rate (LIBOR)
            
Line Of Credit Facility [Line Items]            
Credit facility's interest rate, description     credit facility’s interest rate is London Interbank Offered Rate (“LIBOR”) (0.15% at September 30, 2014) plus 3.25% per annum      
Credit facility's interest rate     0.15%      
Credit facility, basis spread on variable rate     3.25%      
Commitment fee of the unused portion of the credit     0.30%      
Revolving Credit Facility Two
            
Line Of Credit Facility [Line Items]            
Revolving credit agreement maturity date     Oct. 01, 2017      
Exclusion of capital expenditure from fixed charge coverage ratio 4,900,000   4,900,000      
Net income waived     $ 1.00      
Revolving Credit Facility Two | London Interbank Offered Rate (LIBOR)
            
Line Of Credit Facility [Line Items]            
Credit facility's interest rate, description     the interest rate to LIBOR plus 3.00% per annum      
Credit facility, basis spread on variable rate     3.00%      
Commitment fee of the unused portion of the credit     0.40%