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SUMMARY OF RESTRICTED COMMON STOCK (Details) - Restricted Stock [Member] - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted common stock granted 767,934 2,743,668 1,083,313
Restricted common stock forfeited (293,109) (265,080) (721,768) (265,080)
Weighted-average:        
Grant date fair value-granted awards $ 1.24 $ 1.77 $ 3.19
Grant date fair value-forfeited awards $ 1.93 $ 3.18 $ 1.90 $ 3.18