CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Feb. 28, 2013		May 31, 2012
Current Assets:
Cash and cash equivalents	$ 2,318,677		$ 1,077,342
Accounts receivable, less allowance for doubtful accounts of $112,058 and $113,191 as of February 28, 2013 and May 31, 2012, respectively	513,310	[1]	1,200,516	[2]
Inventories, net	1,705,238		1,821,072
Prepaid expenses and other	224,248		210,700
Deferred tax assets, current portion	177,000		177,000
Total current assets	4,938,473		4,486,630
Property and Equipment, net of accumulated depreciation and amortization of $987,167 and $844,684 as of February 28, 2013 and May 31, 2012, respectively	691,750	[3]	584,824	[4]
Deferred Tax Assets, net of current portion	61,000		61,000
Investments	165,324		165,324
Intangible Assets, net	172,656		194,583
Other Assets	81,328		78,561
Total Assets	6,110,531		5,570,922
Current Liabilities:
Accounts payable and accrued expenses	366,389		362,447
Accrued compensation	217,711		186,841
Line of credit			43,000
Total current liabilities	584,100		592,288
Commitments and Contingencies (Note 5)
Shareholders' Equity:
Preferred stock, no par value authorized 5,000,000 shares, none issued and none outstanding at February 28, 2013 and May 31, 2012		[5]		[6]
Common stock, $0.08 par value authorized 25,000,000 shares, issued and outstanding 7,050,214 and 6,952,339 at February 28, 2013 and May 31, 2012, respectively	564,016	[7]	556,186	[8]
Additional paid-in-capital	17,787,546		17,737,807
Accumulated other comprehensive loss	(8,739)		(6,030)
Accumulated deficit	(12,816,392)		(13,309,329)
Total Shareholders' Equity	5,526,431		4,978,634
Total Liabilities and Shareholders' Equity	$ 6,110,531		$ 5,570,922

[1] less allowance for doubtful accounts of $112,058 of February 28, 2013.

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

[3] net of accumulated depreciation and amortization of $987,167 as of February 28, 2013.

[4] net of accumulated depreciation and amortization of $712,176 as of May 31, 2012.

[5] no par value authorized 5,000,000 shares, none issued and none outstanding at February 28, 2013.

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

[7] $0.08 par value authorized 25,000,000 shares, issued and outstanding 7,050,214 at February 28, 2013.

[8] $0.08 par value authorized 25,000,000 shares, issued and outstanding 6,952,339 at May 31, 2012.