Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Feb. 28, 2017	Nov. 30, 2016
Trade accounts and notes receivable, allowance for doubtful accounts	$ 23,827	$ 25,319
Property, plant and equipment, accumulated depreciation	152,988	152,334
Definite lived intangible assets, accumulated amortization	$ 96,389	$ 81,689
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	4,000,000	4,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	15,000,000	15,000,000
Common stock, shares issued (in shares)	8,466,953	8,466,953
Common stock, shares outstanding (in shares)	7,263,508	7,263,508
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares)	0	0