INCOME TAXES (Detail) - Deferred Tax (USD $)	May 31, 2012	May 31, 2011
Deferred tax assets:
Accounts receivable, principally due to allowance for doubtful accounts and sales returns	$ 46,000	$ 13,000
Inventory valuation	30,000	34,000
Compensated absences and deferred payroll	70,000	50,000
Net operating loss carryforwards	327,000	583,000
Tax credit carryforwards	83,000	99,000
Deferred rent expense	31,000	30,000
Other	77,000	70,000
Total deferred tax assets	664,000	879,000
Less valuation allowance	(280,000)	(511,000)
Deferred Tax Asset Net	384,000	368,000
Deferred tax liabilities:
Accumulated depreciation of property and equipment	(146,000)	(130,000)
Deferred Tax Asset Net	238,000	238,000
Deferred tax assets, current portion	177,000	127,000
Deferred tax assets, long-term portion	$ 61,000	$ 111,000