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Exit and Disposal Activities - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Restructuring Cost and Reserve [Line Items]      
Exit and disposal costs $ 0   $ 0
Exit and disposal accrual $ 600,000    
Repair Systems & Information Group [Member]      
Restructuring Cost and Reserve [Line Items]      
Exit and disposal costs   $ 900,000