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STOCKHOLDERS' EQUITY - Preferred Stock Shares (Details) - $ / shares
Jun. 30, 2021
Jun. 30, 2020
STOCKHOLDERS' EQUITY    
Preferred shares, shares authorized 1,000,000 1,000,000
Preferred stock, par value, (per share) $ 0.0001 $ 0.0001
Preferred shares, shares issued 0 0
Preferred shares, shares outstanding 0 0