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Note 4 - Other Assets (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Other Assets [Table Text Block]
  

December 31,

 
  

2020

  

2019

 
         

Prepaid rent

 $4,110  $3,925 

Right-of-use asset

  15   59 

Deposits

  554   134 
  $4,679  $4,118