Note 3 - Revenue From Contracts with Customers - Contract Liabilities (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Feb. 29, 2020 |
Feb. 28, 2019 |
|
| Contract liabilities at the beginning of the year: | $ 1,352,572 | $ 1,494,630 |
| Revenue recognized | (324,982) | (335,028) |
| Contract fees received | 140,750 | 205,500 |
| Amortized gain on the financed sale of equipment | (12,531) | (12,530) |
| Contract liabilities at the end of the year: | $ 1,155,809 | $ 1,352,572 |