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Commitments and Contingencies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Commitments and Contingencies Disclosure [Line Items]    
Future minimum lease payments, 2013 $ 219,000  
Future minimum lease payments, 2014 230,000  
Future minimum lease payments, 2015 160,000  
Future minimum lease payments, 2016 110,000  
Rent expense 273,000 232,000
Mr. Williams
    
Commitments and Contingencies Disclosure [Line Items]    
Minimum annual compensation 205,000 205,000
Accrued bonuses 280,000 236,000
Annual salaries and bonuses 485,000 441,000
Description on annual bonus under employment agreements annual bonus equal to 2% of our first $3,000,000 of the Company's consolidated pre-tax profit (as defined) plus an additional: (i) three percent (3%) of any of the Company's consolidated pre-tax profit in excess of $3,000,000 but less than or equal to $4,000,000; (ii) four percent (4%) of any of the Company's consolidated pre-tax profit in excess of $4,000,000 but less than or equal to $5,000,000; and (iii) five percent (5%) of any of the Company's consolidated pre-tax profit in excess of $5,000,000;  
Messrs. Wachtel and Wunderlich
    
Commitments and Contingencies Disclosure [Line Items]    
Accrued bonuses $ 495,000 $ 418,000
Description on annual bonus under employment agreements In February 2011, Messrs. Wachtel, Wunderlich and Williams entered into new employment agreements. The agreements with Messrs. Wachtel and Wunderlich, which expire on December 31, 2015, provide for no change in the minimum annual compensation, bonus and maximum compensation. Bonus payments to each of Messrs.