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STARBOARD INVESTMENT - Series A and B Warrants (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 18, 2019 | Feb. 25, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 04, 2020
Series B warrants |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Warrants and rights outstanding |  |  | $ 96.4 | $ 52.3 |
Starboard | Series A warrants |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Conversion price | $ 3.65 |  |  |  |
Warrants and rights outstanding | $ 4.8 |  | $ 11.3 | $ 6.6 |
Warrants exercised |  |  | 0 |  |
Number of shares purchased by warrant | 5,000,000 |  |  |  |
Starboard | Series B warrants |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Conversion price |  |  |  |  | $ 3.65
Warrants exercised |  |  | 0 |  |
Number of shares purchased by warrant |  | 100,000,000 |  |  |
Proceeds from issuance of preferred stock and preference stock |  | $ 4.6 |  |  |
Class of Warrant or Right, Warrants Subject to Adjustments |  |  | 31,506,849 |  |
Class of Warrant or Right, Outstanding |  |  | 68,493,151 |  |
Starboard | Maximum | Series A warrants |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Warrants issued, shares | 5,000,000 |  |  |  |
Starboard | Maximum | Series B warrants |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Conversion price |  | $ 5.25 |  |  |
Starboard | Minimum | Series B warrants |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Conversion price |  | $ 3.65 |  |  |

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