6. BALANCE SHEET DETAIL (Tables)

12 Months Ended

May 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Inventories

    INVENTORIES:

	May 31,
(In Thousands)	2018		2017
Raw materials and sub-assemblies	$	5,747	$	4,268
Work in process		3,068		2,059
Finished goods		234		277
	$	9,049	$	6,604

Property and equipment, net

     PROPERTY AND EQUIPMENT, NET:

	May 31,
(In Thousands)	2018			2017
Leasehold improvements	$	1,154		$	1,145
Furniture and fixtures		984			974
Machinery and equipment		2,865			3,035
Test equipment		2,595			2,268
		7,598			7,422
Less: Accumulated depreciation and amortization		(6,395	)		(6,003	)
	$	1,203		$	1,419

Accrued expenses

     ACCRUED EXPENSES:

	May 31,
(In Thousands)	2018		2017
Payroll related	$	1,014	$	934
Professional services		163		161
Accrued interest		139		139
Warranty		135		113
Commissions and bonuses		101		125
Taxes payable		34		69
Investor relations		19		25
Other		41		43
	$	1,646	$	1,609

Customer deposits and deferred revenue, short-term

    CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM:

	May 31,
(In Thousands)	2018		2017
Customer deposits	$	1,340	$	3,264
Deferred revenue		290		203
	$	1,630	$	3,467