Note 12 - Sales-type Leases (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Capital Leases, Income Statement, Sales Type Lease Revenue	$ 0	$ 0	$ 129,104	$ 0