Note 8 - Assets Held for Lease (Details Textual) - USD ($)		3 Months Ended
	Dec. 14, 2018	Feb. 29, 2020	Feb. 28, 2019
Proceeds from Sale of Property, Plant, and Equipment, Total		$ 1,251	$ 893,713
West Union Facility [Member]
Proceeds from Sale of Property, Plant, and Equipment, Total	$ 900,000
Sales [Member]
Operating Lease, Lease Income, Total		155,508	179,044
Other Nonoperating Income (Expense) [Member]
Operating Lease, Lease Income, Total		$ 0	$ 2,500