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2. INVENTORIES (Details) - Schedule of Inventory, Noncurrent - USD ($)
Feb. 28, 2019
Feb. 28, 2018
Inventory Current [Member]    
Current:    
Book inventory $ 33,494,200 $ 27,078,600
Inventory valuation allowance (48,600) (460,000)
Inventories net 33,445,600 26,618,600
Inventory, Noncurrent [Member]    
Current:    
Book inventory 904,400 707,700
Inventory valuation allowance (329,400) (271,800)
Inventories net $ 575,000 $ 435,900