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Note 1 - Basis of Presentation and Significant Accounting Policies (Tables)
12 Months Ended
Jan. 01, 2022
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
  

Year Ended

 
  January 1,  January 2,  December 28, 
  2022  2021  2019 

Weikeng Group

  37%  35%  30%

Arrow Electronics Inc.

  27   25   25 

Other distributors

  23   23   27 

Revenue attributable to distributors

  87%  83%  82%