CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Feb. 28, 2019	May 31, 2018
Current Assets:
Cash and cash equivalents	$ 917,935	$ 1,204,903
Accounts receivable, less allowance for doubtful accounts of $70,887 and $57,695 as of February 28, 2019 and May 31, 2018, respectively	1,077,475	799,940
Inventories, net	2,080,284	2,178,777
Prepaid expenses and other	253,637	300,409
Total current assets	4,329,331	4,484,029
Property and Equipment, net of accumulated depreciation and amortization of $1,739,246 and $1,661,128 as of February 28, 2019 and May 31, 2018, respectively	345,978	351,149
Deferred Tax Assets	10,000	10,000
Investments	165,324	165,324
Intangible Assets, net	95,153	98,923
Other Assets	122,141	113,157
Total Assets	5,067,927	5,222,582
Current Liabilities:
Accounts payable and accrued expenses	889,702	686,956
Accrued compensation	223,754	209,852
Total current liabilities	1,113,456	896,808
Commitments and Contingencies (Note 6)
Shareholders' Equity:
Preferred stock, no par value authorized 5,000,000 shares, none issued and none outstanding at February 28, 2019 and May 31, 2018
Common stock, $0.08 par value authorized 25,000,000 shares, issued and outstanding 9,333,657 and 8,888,011 at February 28, 2019 and May 31, 2018, respectively	746,691	711,040
Additional paid-in-capital	22,049,039	20,843,550
Subscriptions receivable	(6,390)	(9,062)
Accumulated other comprehensive loss	(33,521)	(26,136)
Accumulated deficit	(18,801,348)	(17,193,618)
Total Shareholders' Equity	3,954,471	4,325,774
Total Liabilities and Shareholders' Equity	$ 5,067,927	$ 5,222,582