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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consist of the following:

 

December 31,

2020

2019

 

Inventory at FIFO

Finished goods

$

2,878

$

13,131

Materials and products in process

77,609

65,880

Gross inventories

80,487

79,011

Less: LIFO reserve

(48,016

)

(47,137

)

Less: excess and obsolescence reserve

(3,394

)

(3,573

)

Net Inventories

$

29,077

$

28,301