Consolidated Balance Sheets (Parentheticals) - USD ($)	Nov. 30, 2015	Nov. 30, 2014
Allowance for doubtful accounts	$ 18,810	$ 35,175
Undesignated preferred stock - par value (in dollars per share)	$ 0.01	$ 0.01
Undesignated preferred stock - authorized shares (in shares)	500,000	500,000
Undesignated preferred stock - issued shares (in shares)	0	0
Undesignated preferred stock - outstanding shares (in shares)	0	0
Common stock - par value (in dollars per share)	$ 0.01	$ 0.01
Common stock - authorized shares (in shares)	9,500,000	9,500,000
Common stock - issued shares (in shares)	4,061,052	4,048,552
Common stock - outstanding shares (in shares)	4,061,052	4,048,552