Note 8 - Assets Held for Lease (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
	Dec. 14, 2018	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
West Union Facility [Member]
Proceeds from Sale of Productive Assets, Total	$ 900,000
Sales [Member]
Operating Leases, Income Statement, Lease Revenue, Total		$ 164,508	$ 126,248	$ 512,017	$ 241,766
Other Nonoperating Income (Expense) [Member]
Operating Leases, Income Statement, Lease Revenue, Total		$ 0	$ 0	$ 2,500	$ 38,180