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

SHARE-BASED COMPENSATION - Non vested shares activities (Details)

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SHARE-BASED COMPENSATION - Non vested shares activities (Details) - Non-vested shares - USD ($)
 1 Months Ended 9 Months Ended 12 Months Ended
Nov. 30, 2018
Jul. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Mar. 31, 2017
Number of shares          
Outstanding at the beginning of the period (in shares)     2,700,000 2,625,000 120,000
Granted (in shares)       2,572,584 2,700,000
Vested (in shares)     (60,000) (2,068,586) (60,000)
Forfeited (in shares)     (15,000) (71,250) (60,000)
Cancelled (in shares) (557,470) (1,262,250)      
Outstanding at the end of the period (in shares)     2,625,000 1,795,498 2,700,000
Weighted average grant date fair value          
Outstanding at the beginning of the period (in dollars per share)     $ 1.661 $ 1.650 $ 2.145
Granted (in dollars per share)       0.537 1.650
Vested (in dollars per share)     2.145 0.872 2.145
Forfeited (in dollars per share)     1.650 1.650 1.650
Cancelled (in dollars per share)       1.650  
Outstanding at the end of the period (in dollars per share)     $ 1.650 $ 0.951 $ 1.661
Additional disclosures          
Total fair value of shares vested     $ 148,500 $ 2,591,875 $ 157,176
Number of vested shares withheld upon vesting to satisfy the minimum tax withholding obligation     11,252 93,496 11,624