INCOME TAXES (Details) - Deferred Tax (USD $)	May 31, 2014	May 31, 2013
Deferred tax assets:
Accounts receivable, principally due to allowance for doubtful accounts and sales returns	$ 11,000	$ 47,000
Inventory valuation	16,000	32,000
Compensated absences and deferred payroll	39,000	37,000
Net operating loss carryforwards	325,000	94,000
Tax credit carryforwards	160,000	117,000
Deferred rent expense	21,000	28,000
Other	48,000	42,000
Total deferred tax assets	620,000	397,000
Less valuation allowance	0	0
Deferred Tax Asset Net	620,000	397,000
Deferred tax liabilities:
Accumulated depreciation of property and equipment	(174,000)	(168,000)
Net deferred tax asset	446,000	229,000
Deferred tax assets, current portion	87,000	144,000
Deferred tax assets, long-term portion	359,000	85,000
Deferred tax asset, Total	$ 446,000	$ 229,000