4. PROPERTY AND EQUIPMENT, NET

12 Months Ended

May. 31, 2015

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT, NET

4. PROPERTY AND EQUIPMENT, NET:

    Property and equipment, net comprise (in thousands):

	May 31,
	2015			2014
Leasehold improvements	$	1,093		$	1,093
Furniture and fixtures		1,062			1,094
Machinery and equipment		3,802			3,801
Test equipment		2,967			3,041
		8,924			9,029
Less: Accumulated depreciation
and amortization		(8,446	)		(8,555	)
	$	478		$	474

Depreciation expense was $135,000, $141,000 and $322,000 for fiscal 2015, 2014, and 2013, respectively.