CONSOLIDATED BALANCE SHEETS (USD $)	May 31, 2012		May 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 1,077,342		$ 989,270
Accounts receivable	1,200,516	[1]	747,075	[2]
Inventories, net	1,821,072		1,785,525
Deferred tax assets, current portion	177,000		127,000
Prepaid expenses and other	210,700		237,563
Total current assets	4,486,630		3,886,433
PROPERTY AND EQUIPMENT
Equipment	1,185,098		1,065,145
Furniture, fixtures and leasehold improvements	244,410		214,353
Total property and equipment	1,429,508		1,279,498
Accumulated depreciation	(844,684)		(712,175)
Net property and equipment	584,824		567,323
DEFERRED TAX ASSETS, net of current portion	61,000		111,000
INTANGIBLE ASSETS, net	194,583		177,410
INVESTMENTS	165,324		165,324
OTHER ASSETS	78,561		47,888
TOTAL ASSETS	5,570,922		4,955,378
CURRENT LIABILITIES
Accounts payable and accrued expenses	362,447		451,569
Accrued compensation	186,841		138,056
Line of credit	43,000
Loan for equipment purchase			35,390
Total current liabilities	592,288		625,015
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Preferred stock		[3]		[4]
Common stock	556,186	[5]	549,466	[6]
Additional paid-in capital	17,737,807		17,643,121
Accumulated other comprehensive loss	(6,030)		(4,460)
Accumulated deficit	(13,309,329)		(13,857,764)
Total shareholders' equity	4,978,634		4,330,363
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 5,570,922		$ 4,955,378

[1] less allowance for doubtful accounts of $113,191 as of May 31, 2012.

[2] less allowance for doubtful accounts of $32,204 as of May 31, 2011.

[3] no par value authorized 5,000,000 shares, none issued and none outstanding at May 31, 2012.

[4] no par value authorized 5,000,000 shares, none issued and none outstanding at May 31, 2011

[5] $0.08 par value authorized 25,000,000 shares, issued and outstanding 6,952,339 at May 31, 2012.

[6] $0.08 par value authorized 25,000,000 shares, issued and outstanding 6,868,339 at May 31, 2011