CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	May 31, 2013	May 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 2,469,796	$ 1,077,342
Accounts receivable, less allowance for doubtful accounts of $115,730 and $113,191, respectively	871,660	1,200,516
Inventories, net	1,571,221	1,821,072
Deferred tax assets, current portion	144,000	177,000
Prepaid expenses and other	196,678	210,700
Total current assets	5,253,355	4,486,630
PROPERTY AND EQUIPMENT
Equipment	1,429,906	1,185,098
Furniture, fixtures and leasehold improvements	256,723	244,410
Total property and equipment	1,686,629	1,429,508
Accumulated depreciation	(1,032,009)	(844,684)
Net property and equipment	654,620	584,824
DEFERRED TAX ASSETS, net of current portion	85,000	61,000
INTANGIBLE ASSETS, net	165,200	194,583
INVESTMENTS	165,324	165,324
OTHER ASSETS	71,388	78,561
TOTAL ASSETS	6,394,887	5,570,922
CURRENT LIABILITIES
Accounts payable and accrued expenses	351,917	362,447
Accrued compensation	207,976	186,841
Line of credit		43,000
Total current liabilities	559,893	592,288
COMMITMENTS AND CONTINGENCIES (NOTE 8)
SHAREHOLDERS' EQUITY
Preferred stock, no par value, 5,000,000 authorized shares, no shares issued and outstanding at May 31, 2013 and 2012
Common stock, $.08 par value; 25,000,000 shares authorized; 7,274,714 and 6,952,339 shares issued and outstanding, respectively	581,976	556,186
Additional paid-in capital	18,034,396	17,737,807
Accumulated other comprehensive loss	(9,006)	(6,030)
Accumulated deficit	(12,772,372)	(13,309,329)
Total shareholders' equity	5,834,994	4,978,634
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 6,394,887	$ 5,570,922