v3.3.0.814
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 26, 2015
Dec. 27, 2014
Sep. 27, 2014
Dec. 28, 2013
Schedule Of Significant Accounting Policies [Line Items]        
Allowance for doubtful loans and leases receivable $ 126,770 $ 91,640 $ 130,980 $ 201,960
Periodic installments of principal and interest 24 months      
Definite-lived intangible assets $ 0 $ 0    
Maximum [Member]        
Schedule Of Significant Accounting Policies [Line Items]        
Insured amount by the federal deposit insurance corporation $ 250,000