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LAND USE RIGHTS, NET - Amortization Expense (Details)
$ in Thousands, ¥ in Millions
12 Months Ended
Jul. 08, 2019
CNY (¥)
Mar. 19, 2019
CNY (¥)
item
Feb. 28, 2022
USD ($)
Feb. 28, 2021
USD ($)
Feb. 29, 2020
USD ($)
Finite-Lived Intangible Assets [Line Items]          
Cost of land use rights         $ 6,780
Amortization of intangible assets     $ 13,905 $ 24,030 $ 15,677
LAND USE RIGHTS          
Finite-Lived Intangible Assets [Line Items]          
Number of land use rights acquired | item   2      
Useful life     50 years    
Amortization of intangible assets     $ 4,600 $ 4,345  
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]          
2022     4,649    
2023     4,649    
2024     4,649    
2025     4,649    
2026     4,649    
Thereafter     $ 194,463    
LAND USE RIGHTS | Zhenjiang, Jiangsu          
Finite-Lived Intangible Assets [Line Items]          
Cost of land use rights | ¥   ¥ 92      
Number of square meters of land use rights acquired | m²   83,025      
LAND USE RIGHTS | Beijing          
Finite-Lived Intangible Assets [Line Items]          
Cost of land use rights | ¥ ¥ 1,360        
Number of square meters of land use rights acquired | m² 28,600