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Notes Payable - Additional Information (Detail) - USD ($)
1 Months Ended 9 Months Ended
Mar. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]      
Revolving line of credit   $ 1,500,000  
Long-term borrowings outstanding   3,578,000 $ 3,778,000
Current portion of long-term note payable   $ 267,000 222,000
Term Note      
Debt Instrument [Line Items]      
Credit facility, basis spread on variable rate   3.50%  
Credit facility's interest rate   3.70%  
Debt instrument, maturity date   Mar. 31, 2020  
Notes payable to bank   $ 4,000,000  
Debt instrument interest rate, description   The Term Loan accrues interest at the adjusted LIBOR Rate plus a margin of 3.50% (3.70% at September 30, 2015).  
Debt Instrument, Quarterly Payment, Principal   $ 70,000  
Balloon payment of loan   2,710,000  
Long-term borrowings outstanding   3,850,000 $ 0
Current portion of long-term note payable   $ 270,000  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving credit agreement amendment date   2015-03  
Revolving credit agreement maturity date   Dec. 31, 2015  
Repayment of previous revolving credit $ 4,000,000    
Credit facility, basis spread on variable rate   3.25%  
Credit facility's interest rate, Description   interest payable monthly at the adjusted LIBOR Rate plus a margin of 3.25% (3.45% at September 30, 2015).  
Credit facility's interest rate   3.45%  
Revolving line of credit   $ 1,500,000  
Minimum | Revolving Credit Facility      
Debt Instrument [Line Items]      
Line of credit facility, remaining borrowing capacity   $ 1,500,000