CONSOLIDATED BALANCE SHEETS PARENTHETICALS - USD ($)	May 31, 2016	May 31, 2015
PARENTHETICALS
Allowance for uncollectible accounts	$ 18	$ 18
Redeemable common stock, par value	$ 0.10	$ 0.10
Redeemable common Stock, shares issued	180,000	170,000
Redeemable common Stock, shares outstanding	180,000	170,000
Common Stock, par value	$ 0.10	$ 0.10
Common Stock, shares authorized	20,000,000	20,000,000
Common Stock, shares issued	723,724	723,724
Common Stock, shares outstanding	723,724	723,724