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