v2.4.0.8
Product Warranties - Activity in Product Warranty Reserves (Detail) (USD $)
12 Months Ended
Dec. 28, 2013
Dec. 31, 2012
Guarantees [Abstract]    
Balance at beginning of period $ 1,170,000 $ 1,330,000
Warranty charges 1,538,363 1,193,893
Warranty payments (1,523,363) (1,353,893)
Balance at end of period $ 1,185,000 $ 1,170,000