Note 15 - Common Stock Purchase Agreement - Summary of Shares Purchased by Alumni Capital (Details) - Alumni Capital [Member] - USD ($)							6 Months Ended
	Sep. 23, 2022	Aug. 23, 2022	Aug. 15, 2022	Aug. 03, 2022	Jul. 25, 2022	Mar. 29, 2022	May 31, 2023	May 31, 2022
Common stock purchase agreement (in shares)	65,000	65,000	50,000	50,000	50,000	20,000	280,000	20,000
7/25/2022 (in dollars per share)	$ 1.76	$ 1.99	$ 2.00	$ 1.98	$ 2.07
7/25/2022	$ 114,120	$ 129,253	$ 99,910	$ 98,940	$ 103,305		$ 545,528