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Note 8 - Components of Working Capital Accounts
12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Supplemental Balance Sheet Disclosures [Text Block]
8.
Components of working capital accounts
 
    December 31,   December 31,
    2020   2019
         
Inventories                
Work-in-progress   $
103,969
    $
66,514
 
Finished goods    
16,531
     
15,347
 
Supplies and other    
21,479
     
12,650
 
                 
    $
141,979
    $
94,511
 
                 
Accrued liabilities                
Accrued payroll and benefits   $
160,795
    $
94,010
 
Value appreciation plans    
35
     
6,510
 
Customer advances    
2,730
     
1,454
 
Other    
87,632
     
63,470
 
    $
251,192
    $
165,444