Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Stock Option Activity (Details)

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STOCK-BASED COMPENSATION - Stock Option Activity (Details) - USD ($)
12 Months Ended
Jan. 17, 2019
Oct. 12, 2018
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation, Stock Options, Activity [Line Items]        
Granted - Weighted Average Exercise Price (in dollars per share) $ 1.99 $ 2.61 $ 2.33 $ 2.99
Stock Option Activity [Member]        
Share-based Compensation, Stock Options, Activity [Line Items]        
Outstanding - Number of Shares Issuable Upon Exercise of Outstanding Options     232,343 53,165
Granted - Number of Shares Issuable Upon Exercise of Outstanding Options     411,930 184,129
Expired- Number of Shares Issuable Upon Exercise of Outstanding Options     0 (2,344)
Forfeited - Number of Shares Issuable Upon Exercise of Outstanding Options     (33,559) (2,607)
Outstanding - Number of Shares Issuable Upon Exercise of Outstanding Options     610,714 232,343
Exercisable - Number of Shares Issuable Upon Exercise of Outstanding Options     248,971  
Unvested - Number of Shares Issuable Upon Exercise of Outstanding Options     361,743  
Outstanding - Weighted Average Exercise Price (in dollars per share)     $ 14.37 $ 73.82
Granted - Weighted Average Exercise Price (in dollars per share)     2.33 2.99
Expired- Weighted Average Exercise Price (in dollars per share)     0.00 463.16
Forfeited - Weighted Average Exercise Price (in dollars per share)     4.78 19.46
Outstanding - Weighted Average Exercise Price (in dollars per share)     6.78 $ 14.37
Exercisable - Weighted Average Exercise Price (in dollars per share)     13.15  
Unvested - Weighted Average Exercise Price (in dollars per share)     $ 2.39  
Outstanding - Weighted Average Remaining Contracted Term in Years     8 years 9 months 29 days 9 years 3 months 18 days
Exercisable - Weighted Average Remaining Contracted Term in Years     8 years 4 months 10 days  
Unvested - Weighted Average Remaining Contracted Term in Years     9 years 1 month 28 days  
Outstanding - Aggregate Intrinsic Value     $ 34,750 $ 0
Exercisable - Aggregate Intrinsic Value (in dollars)     100  
Unvested - Aggregate Intrinsic Value (in dollars)     $ 34,650