Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Summary of the Non-vested Shares Activities (Details)

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SHARE-BASED COMPENSATION - Summary of the Non-vested Shares Activities (Details) - Non-vested shares - $ / shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SHARE-BASED COMPENSATION      
Outstanding at the beginning of the period (in shares) 297,750 199,336 603,088
Granted (in shares) 872,500 350,500 77,500
Vested (in shares) (133,950) (199,336) (419,752)
Forfeited (in share) (29,250) (52,750) (61,500)
Outstanding at the end of the period (in shares) 1,007,050 297,750 199,336
Outstanding at the beginning of the period (in dollars per share) $ 0.881 $ 0.671 $ 0.955
Granted (in dollars per share) 0.467 0.841 1.545
Vested (in dollars per share) 0.851 0.671 1.112
Forfeited & Cancelled (in dollars per share) 0.925 0.615 1.545
Outstanding at the end of the period (in dollars per share) $ 0.525 $ 0.881 $ 0.671