Note 7 - Goodwill and Intangible Assets (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
Amortization of Intangible Assets, Total $ 120,873 $ 137,050 $ 363,085 $ 428,411