Note 6 - Property and Equipment, Net - Property and Equipment (Details) - USD ($) |
Nov. 30, 2021 |
Feb. 28, 2021 |
|---|---|---|
| Property, plant and equipment, gross | $ 17,887,713 | $ 17,683,432 |
| Less accumulated depreciation | (12,442,247) | (12,531,417) |
| Property and equipment, net | 5,445,466 | 5,152,015 |
| Land [Member] | ||
| Property, plant and equipment, gross | 513,618 | 513,618 |
| Building [Member] | ||
| Property, plant and equipment, gross | 5,148,854 | 4,827,807 |
| Machinery and Equipment [Member] | ||
| Property, plant and equipment, gross | 9,962,400 | 10,129,508 |
| Furniture and Fixtures [Member] | ||
| Property, plant and equipment, gross | 787,921 | 797,303 |
| Leasehold Improvements [Member] | ||
| Property, plant and equipment, gross | 995,219 | 985,407 |
| Transportation Equipment [Member] | ||
| Property, plant and equipment, gross | $ 479,701 | $ 429,789 |