Inventories

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

The following table is a summary of inventories (in thousands):	March 31, 2018			December 31, 2017
Raw materials and subassemblies	$	20,455		$	20,448
Work-in-process	1,342			1,146
Finished goods	7,967			7,953
Reserve for excess and obsolete inventories	(15,036		)	(15,039		)
Total	$	14,728		$	14,508