v2.4.1.9
Product Warranties - Activity in Product Warranty Reserves (Detail) (USD $)
3 Months Ended
Mar. 28, 2015
Guarantees [Abstract]  
Balance at beginning of period $ 1,245,000us-gaap_ProductWarrantyAccrualClassifiedCurrent
Warranty charges 371,088us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Warranty payments (371,088)us-gaap_StandardProductWarrantyAccrualPayments
Balance at end of period $ 1,245,000us-gaap_ProductWarrantyAccrualClassifiedCurrent