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Inventories
12 Months Ended
Dec. 31, 2019
Inventories [Abstract]  
Inventories
2. Inventories

Inventories consist of the following:


 
December 31
 
   
2019
   
2018
 
Raw materials and parts
 
$
160,872
   
$
173,919
 
Work-in-process
   
61,287
     
69,718
 
Finished goods
   
53,650
     
89,152
 
Used equipment
   
18,727
     
23,155
 
Total
 
$
294,536
   
$
355,944