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STARBOARD INVESTMENT - Series A and B Warrants (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 25, 2022 | Nov. 18, 2019 | Mar. 31, 2022 | Dec. 31, 2021 | Jun. 04, 2020 | Feb. 25, 2020
Series B warrants |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants and rights outstanding |  |  | $ 73.1 | $ 96.4 |  |
Starboard | Series A warrants |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Conversion price |  | $ 3.65 |  |  |  |
Warrants and rights outstanding, term |  |  | 8 years |  |  |
Warrants and rights outstanding |  | $ 4.8 | $ 10.4 | $ 11.3 |  |
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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