Inventory

Inventory was comprised of the following:



	June 30,
	2018		2017
Raw materials	$	61,748	$	48,645
Work in process	30,841		22,567
Finished goods	15,996		9,859
Total	$	108,585	$	81,071

The $27,514 increase in inventory was primarily due to an increase in overall demand, especially for larger, more complex sub-assemblies and integrated sub-systems, an investment in component and safety stock inventory for the transition to insourced manufacturing, and the acquisition of Themis. There are no amounts in inventory relating to contracts having production cycles longer than one year.