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Inventories, net (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory Inventories at December 31, 2020 and 2019 were as follows (in thousands):
December 31,
20202019
Pipe and connectors, net of allowance of $16,819 and $18,287, respectively
$22,642 $21,779 
Finished goods, net of allowance of $84 and $485, respectively
22,715 25,628 
Work in progress1,730 3,663 
Raw materials, components and supplies34,631 27,759 
Total inventories, net$81,718 $78,829