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Note 10 - Significant Customers / Concentration / Disaggregated Revenue (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
  

For the Three Months

 
  

Ended March 31,

 
  

2022

  

2021

 

Customer A

  12

%

  *%

Customer B

  *

%

  18%

Customer C

  *

%

  10%
  

March 31,

2022

  

December 31,

2021

 

Customer B

  *

%

  11

%

Customer C

  *

%

  17

%

Customer D

  12

%

  *

%

Customer E

  *

%

  16

%