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Note 4 - Inventories, Net (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2021

  

2020

 

Pipe and connectors, net of allowance of $14,630 and $16,819, respectively

 $22,896  $22,642 

Finished goods, net of allowance of $84 and $84, respectively

  20,767   22,715 

Work in progress

  1,240   1,730 

Raw materials, components and supplies, net of allowance of $181 and none, respectively

  46,873   34,631 

Total inventories, net

 $91,776  $81,718