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Note 2 - Business Acquisitions (Tables)
12 Months Ended
Dec. 26, 2020
Xcerra [Member]  
Notes Tables  
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
  

Estimated

Fair Value

  

Weighted

Average

Useful Life

(years)

 

Developed technology

 $194,600   7.8 

Customer relationships

  65,890   10.6 

In-process research and development

  36,360  

indefinite

 

Product backlog

  6,410   0.8 

Trademarks and trade names

  16,800   11.0 

Favorable leases

  1,100   5.5 

Total intangible assets

 $321,160