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Business Combinations - Additional Information (Detail) (USD $)
3 Months Ended 1 Months Ended 3 Months Ended
Mar. 29, 2013
Mar. 30, 2012
Jan. 15, 2013
Jan. 15, 2013
Maximum
Jan. 15, 2013
NDS Surgical Imaging, LLC
Jan. 15, 2013
NDS Surgical Imaging KK
Mar. 29, 2013
NDS
Business Acquisition [Line Items]              
Ownership percentage         100.00% 100.00%  
Cash consideration     $ 82,653,000        
Acquisition related cost 1,066,000            
Cumulative acquisition related cost 1,800,000            
Sales 83,114,000 65,186,000         18,400,000
Income (loss) from continuing operations 1,433,000 1,059,000         200,000
Estimates and assumptions, measurement period       1 year      
Goodwill     28,693,000        
Intangible assets     37,003,000        
Deferred tax liabilities     $ 315,000