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Consolidated Statements of Comprehensive Loss (Parentheticals) - $ / shares
4 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 30, 2021
Jun. 30, 2023
Jun. 30, 2022
Profit or loss [abstract]        
Diluted loss per share $ (0.01) $ (0.07) $ (1.50) $ (0.15)