INCOME TAXES (Details) - Deferred Tax (USD $)	May 31, 2013	May 31, 2012
Deferred tax assets:
Accounts receivable, principally due to allowance for doubtful accounts and sales returns	$ 47,000	$ 46,000
Inventory valuation	32,000	30,000
Compensated absences and deferred payroll	37,000	70,000
Net operating loss carryforwards	94,000	327,000
Tax credit carryforwards	117,000	83,000
Deferred rent expense	28,000	31,000
Other	42,000	77,000
Total deferred tax assets	397,000	664,000
Less valuation allowance	0	(280,000)
Deferred Tax Asset Net	397,000	384,000
Deferred tax liabilities:
Accumulated depreciation of property and equipment	(168,000)	(146,000)
Net deferred tax asset	229,000	238,000
Deferred tax assets, current portion	144,000	177,000
Deferred tax assets, long-term portion	$ 85,000	$ 61,000