Inventories

3 Months Ended

Mar. 31, 2023

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories consist of the following (in thousands):

	March 31, 2023			December 31, 2022
Raw materials	$	7,760		$	6,556
Work in process		425			530
Finished goods		2,270			2,697
Reserve for excess and obsolescence		(1,945	)		(1,907	)
Total inventory	$	8,510		$	7,876

The reserve for excess and obsolescence primarily includes Niobe Systems and related raw materials and spare parts.