Note 8 - Assets Held for Lease (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Dec. 14, 2018	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
West Union Facility [Member]
Proceeds from Sale of Productive Assets, Total	$ 900,000
Sales [Member]
Operating Leases, Income Statement, Lease Revenue, Total		$ 168,465	$ 66,558	$ 347,509	$ 115,518
Other Nonoperating Income (Expense) [Member]
Operating Leases, Income Statement, Lease Revenue, Total		$ 0	$ 0	$ 2,500	$ 38,180