Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF RESTRICTED COMMON STOCK (Details)

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SUMMARY OF RESTRICTED COMMON STOCK (Details) - Restricted Stock [Member] - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted common stock granted 926,484 1,083,313 1,975,734 1,083,313
Restricted common stock forfeited (220,136) (428,659)
Weighted-average:        
Grant date fair value-granted awards $ 1.60 $ 3.19 $ 1.97 $ 3.19
Grant date fair value-forfeited awards $ 2.05 $ 1.89