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Note 16 - Revenue (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
   
Year Ended December 31,
 
   
2019
   
2018
   
2017
 
Net sales from continuing operations by geographic region:
                       
United States
  $
252,797
    $
161,415
    $
122,179
 
Canada
   
26,520
     
10,734
     
10,601
 
Total
  $
279,317
    $
172,149
    $
132,780