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Note 15 - Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2021
Notes Tables  
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]
   
For the Three Months Ended March 31,
  
   
2021
    
2020
  
Balance at beginning of period
   $
473
     $
127
  
Bad debt expense
    
5
      
55
  
Write-offs
    
(222
 )    
(19
 )
Other adjustments
    
(1
 )    
(7
 )
Balance at end of period
   $
255
     $
156