DEFERRED TAX ASSETS (LIABILITIES) (DETAILS) - USD ($) $ in Thousands	May 31, 2016	May 31, 2015
Deferred tax assets
Net operating loss carryforwards	$ 7,597	$ 7,498
Tax credit carryforwards	254	254
Receivables allowances	7	7
Vacation pay accrual	5	4
Depreciation	42	35
Differences in book and tax basis of assets of acquired businesses	(191)	(56)
Total gross deferred tax assets	7,714	7,742
Valuation allowance	$ (7,714)	(7,742)
Net deferred tax asset		$ 0