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INVENTORIES

3 Months Ended

Mar. 31, 2018

4.INVENTORIES

Inventories include costs of materials, direct labor and manufacturing overhead, and are stated at the lower of cost (first-in, first-out basis) or net realizable value, as follows (in thousands):

	March 31, 2018			December 31, 2017
Parts and raw materials	$	28,271		$	24,910
Work-in-process	7,467			5,984
Finished goods	8,327			6,075

	44,065			36,969
Less reserves	(4,446		)	(4,401		)

Inventories	$	39,619		$	32,568