Note 13 - Sales-type Leases (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Capital Leases, Income Statement, Sales Type Lease Revenue	$ 0	$ 0	$ 0	$ 426,542