Inventories, Net (Tables)

3 Months Ended

Mar. 31, 2021

Inventories, Net

Schedule of inventories, net

Inventories are valued principally at the lower of cost, determined using the average cost method, or market. Costs for raw materials and finished goods include materials, labor, and production overhead. Inventories, net consisted of the following (in thousands):

	March 31,		December 31,
	2021		2020
Lime and limestone inventories:
Raw materials	$	4,495	$	4,279
Finished goods		2,713		2,866
		7,208		7,145
Service parts inventories		8,201		8,065
	$	15,409	$	15,210