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STOCKHOLDER'S EQUITY (DEFICIT) - Narrative (Details) - Special Warrants
May 01, 2019
$ / shares
Class of Stock [Line Items]  
Special warrants, exercise price per share (in dollars per share) $ 0.001
Special warrants, conversion terms, ownership percentage of common stock 4.99%
Special warrants, conversion terms, ownership percentage of capital stock or voting interests 22.50%