7. INVENTORIES

9 Months Ended

Feb. 28, 2019

Inventory Disclosure [Abstract]

7. INVENTORIES

7. INVENTORIES

    Inventories are comprised of the following (in thousands):

	February 28,		May 31,
	2019		2018
Raw materials and sub-assemblies	$	5,276	$	5,747
Work in process		3,678		3,068
Finished goods		235		234
	$	9,189	$	9,049

    During the three and nine months ended February 28, 2019, the Company wrote down $795,000 and $802,000 of inventory, respectively. During the three and nine months ended February 28, 2018, the Company wrote down $7,000 and $91,000 of inventory, respectively.