v2.4.0.8
Product Warranties - Activity in Product Warranty Reserves (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 27, 2014
Guarantees [Abstract]    
Balance at beginning of period $ 1,145,000 $ 1,185,000
Warranty charges 440,648 1,218,432
Warranty payments (380,648) (1,198,432)
Balance at end of period $ 1,205,000 $ 1,205,000