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SHAREHOLDERS' EQUITY - Preference Shares (Details) - $ / shares
Sep. 30, 2021
Dec. 31, 2020
SHAREHOLDERS' EQUITY    
Preferred shares, shares authorized 1,000,000 1,000,000
Preferred shares, par value $ 0.0001 $ 0.0001
Preferred shares, shares issued 0 0
Preferred shares, shares outstanding 0 0