Note 3 - Revenue From Contracts With Customers - Contract Liabilities (Details) - USD ($) |
9 Months Ended | |
|---|---|---|
Nov. 30, 2021 |
Nov. 30, 2020 |
|
| Contract liabilities at the beginning of the year: | $ 1,119,646 | $ 1,155,809 |
| Revenue recognized | (164,952) | (174,689) |
| Contract fees received | 188,000 | 161,000 |
| Amortized gain on the financed sale of equipment | (21,928) | (7,309) |
| Contract liabilities at the end of the period: | $ 1,120,766 | $ 1,134,811 |