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ORGANIZATION AND OPERATIONS (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 03, 2019 $ / shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 $ / shares shares | Jun. 29, 2020 $ / shares | Jun. 28, 2020 $ / shares | Feb. 29, 2020 $ / shares | Jan. 31, 2020 $ / shares shares | Nov. 21, 2017 $ / shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, par value (in usd per share) | $ 0.003 | $ 0.001 | $ 0.001 |  |  |  |  |
Common stock, shares authorized (in shares) | shares |  | 900,000,000 | 900,000,000 |  |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  | 100,000,000 |  |  |  |  |  |
Reverse stock split ratio, common stock | 0.3333 |  |  |  |  |  |  |
Registration Statement |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of warrants included in preferred stock unit (in shares) | shares |  |  |  |  |  |  | 1 |
Warrant right to purchase a share of common stock (in shares) | shares |  | 0.25 |  |  |  |  | 0.25 |
Rights Offering |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Purchase price (in usd per share) |  | $ 9.25 |  |  |  |  |  |
Sale of stock, number of shares issued (in shares) | shares |  | 8,521,589 |  |  |  |  |  |
Consideration received on transaction | $ |  | $ 78.8 |  |  |  |  |  |
Reduction to additional paid-in capital, due to offering costs incurred | $ |  | $ 1.9 |  |  |  |  |  |
Series L Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, par value (in usd per share) |  | $ 0.001 | $ 0.001 |  |  |  |  |
Preferred stock, liquidation preference per share (in usd per share) |  | 28.37 | 28.37 |  |  |  |  |
Series L Preferred Stock | Registration Statement |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, liquidation preference per share (in usd per share) |  |  |  |  |  |  |  | $ 28.37
Series A Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, par value (in usd per share) |  | 0.001 | 0.001 |  |  |  |  |
Preferred stock, liquidation preference per share (in usd per share) |  | 25.00 | 25.00 |  |  |  |  |
Series A Preferred Stock | Registration Statement |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Number of shares included in preferred stock unit (in shares) | shares |  |  |  |  |  |  | 1 |
Preferred stock, par value (in usd per share) |  | 0.001 |  |  |  |  | $ 0.001 |
Preferred stock, stated value (in usd per share) |  | 25.00 |  |  |  |  | $ 25.00 |
Series A Preferred Stock | Continuous Public Offering |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Purchase price (in usd per share) |  |  |  |  |  | $ 25.00 |  |
Series D Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, par value (in usd per share) |  | 0.001 | 0.001 |  |  | 0.001 |  |
Preferred stock, liquidation preference per share (in usd per share) |  | $ 25.00 | $ 25.00 |  |  | 25.00 |  |
Series D Preferred Stock | Continuous Public Offering |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Purchase price (in usd per share) |  |  |  | $ 24.50 | $ 25.00 | $ 25.00 |  |

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