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Note 1 - Basis of Presentation and Significant Accounting Policies (Tables)
12 Months Ended
Jan. 02, 2021
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
  

Year Ended

 
  January 2, 2021  December 28, 2019  December 29, 2018 

Weikeng Group

  35%  30%  25%

Arrow Electronics Inc.

  25   25   29 

Other distributors

  23   27   29 

Revenue attributable to distributors

  83%  82%  83%