v2.4.0.6
Accounting for Guarantees (Details Textual) (USD $)
9 Months Ended
Sep. 29, 2012
Dec. 31, 2011
Sep. 29, 2012
Warranty on Products for Labor [Member]
Minimum [Member]
Sep. 29, 2012
Warranty on Products for Labor [Member]
Maximum [Member]
Sep. 29, 2012
Warranty for Products for Parts [Member]
Minimum [Member]
Sep. 29, 2012
Warranty for Products for Parts [Member]
Maximum [Member]
Guarantor Obligations (Textual) [Abstract]            
Product warranty period     1 year 3 years 1 year 10 years
Accounting for Guarantees (Additional Textual) [Abstract]            
Maximum contingent liability $ 2,023,000          
Reserve for estimated losses 126,000 203,000        
Net liability for guarantees $ 16,000 $ 27,000