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Note 5 - Revenue From Contracts With Customers (Tables)
 3 Months Ended
Mar. 31, 2021
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Three Months Ended

March 31,
 
   
2021
   
2020
 
Net revenues by customer type:
  
 
 
 
  
 
 
 
End user
   $
17,660
     $
9,922
  
OEM/Integrator
    
1,896
      
1,308
  
    $
19,556
     $
11,230
  
                 
Net revenues by product type:
  
 
 
 
  
 
 
 
Thermal test
   $
4,305
     $
4,147
  
Thermal process
    
5,566
      
3,748
  
Semiconductor production test
    
8,320
      
1,825
  
Service/other
    
1,365
      
1,510
  
    $
19,556
     $
11,230
  
                 
Net revenues by market:
  
 
 
 
  
 
 
 
Semi Market
   $
13,320
     $
5,011
  
Multimarket:
                
Industrial
    
3,828
      
4,227
  
Defense/aerospace
    
1,129
      
1,408
  
Telecommunications
    
340
      
411
  
Other Multimarket
    
939
      
173
  
    $
19,556
     $
11,230