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Note 2 - Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
December 31,
  
   
2019
    
2018
  
Accrued liabilities:
                
Accrued bonus
   $
3,977
     $
358
  
Accrued vacation payable
    
2,263
      
2,211
  
Operating lease liabilities
    
1,642
      
-
  
Accrued sales tax
    
1,537
      
1,753
  
Finance lease liabilities
    
420
      
416
  
Workers compensation reserves
    
269
      
452
  
Other
    
3,684
      
2,773
  
Total accrued liabilities
   $
13,792
     $
7,963
  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Year Ended December 31,
 
   
2019
    
2018
    
2017
  
                         
Income (loss) from continuing operations
   $
27,902
     $
20,312
     $
(8,392
 )
Loss on discontinued operations
    
-
      
-
      
(1,771
 )
Net income (loss)
   $
27,902
     $
20,312
     $
(10,163
 )
                         
Basic weighted-average common shares outstanding
    
9,741
      
9,726
      
9,613
  
Effect of potentially dilutive common shares
(1)
    
38
      
7
      
-
  
Diluted weighted-average common shares outstanding
    
9,779
      
9,733
      
9,613
  
                         
Income (loss) per basic common share:
                        
Continuing operations
   $
2.86
     $
2.09
     $
(0.88
 )
Discontinued operations
    
-
      
-
      
(0.18
 )
Net income (loss) per share
   $
2.86
     $
2.09
     $
(1.06
 )
                         
Income (loss) per diluted common share:
                        
Continuing operations
   $
2.85
     $
2.09
     $
(0.88
 )
Discontinued operations
    
-
      
-
      
(0.18
 )
Net income (loss) per share assuming dilution
   $
2.85
     $
2.09
     $
(1.06
 )