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Note 12 - Goodwill (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Goodwill [Table Text Block]
    U.S.
Goodwill		   London
Goodwill		   Total
Balances at December 31, 2018   $
12,563
     $
629
     $
13,192
  
2019 Goodwill impairment    
(4,845
 )    
-
      
(4,845
 )
Balance as of December 31, 2019    
7,718
      
629
      
8,347
  
2020 Goodwill Impairment    
(800
 )    
-
      
(800
 )
Balance as of December 31, 2020   $
6,918
     $
629
     $
7,547