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Equity and Long-term Investments and Fair Value Measurements - Equity Investment in InCarda (Details) - InCarda $ / shares in Units, $ in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jun. 15, 2022 USD ($) $ / shares shares | Mar. 09, 2022 USD ($) | Mar. 31, 2023 USD ($) Director | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Sep. 30, 2020 USD ($) shares | Dec. 31, 2022 USD ($)
Equity Investment |  |  |  |  |  |  |
Number of Investee's Board members currently representing the Company | Director |  |  | 1 |  |  |  |
Number of the Investee's Board members | Director |  |  | 8 |  |  |  |
Unrealized gain loss from fair value changes in equity investments |  |  | $ (0.1) |  | $ 0.6 |  |
Carrying value wrote off warrant exercise |  |  | $ 0.1 |  |  |  |
Consolidated Investees [Member] |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Equity investment ownership percentage |  |  | 9.00% |  |  |  | 9.00%
Series C preferred stock and warrants |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Amount of securities purchase agreement |  |  |  |  |  | $ 15.8 |
Warrants |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Maximum number of additional shares into which warrants may be converted under the securities purchase agreement | shares |  |  |  |  |  | 5,117,358 |
Extended expiration date |  |  | Mar. 31, 2023 |  |  |  |
Convertible note and warrants |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Amount of securities purchase agreement |  | $ 0.7 |  |  |  |  |
Common stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Number of shares issued resulting from recapitalization of equity structure | shares | 4,093,886 |  |  |  |  |  |
Series A1 preferred stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | shares | 37,350 |  |  |  |  |  |
Series D 1 Preferred Stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | shares | 8,771,780 |  |  |  |  |  |
Series D 2 Preferred Stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | shares | 3,369,802 |  |  |  |  |  |
Series D1 Warrant |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | shares | 2,490,033 |  |  |  |  |  |
Exercise price of warrants | $ / shares | $ 0.20 |  |  |  |  |  |
Series C preferred stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Number of shares issued resulting from recapitalization of equity structure | shares |  |  |  |  |  | 20,469,432 |
Debt Conversion, Converted Instrument, Shares Issued | shares | 5,117,358 |  |  |  |  |  |
Transaction cost |  |  |  |  |  | $ 0.8 |
Equity and long-term investments at fair value |  |  | $ 6.8 |  |  |  | $ 6.8
Impairment of equity investments |  |  |  | $ 9.0 |  |  |
Exercise price of warrants | $ / shares | $ 0.73 |  |  |  |  |  |
Series D warrants |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Equity and long-term investments at fair value |  |  | 0.5 |  |  |  | 0.6
Series D Preferred Stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Payments to acquire equity securities | $ 2.3 |  |  |  |  |  |
Series D1 Preferred Stock, Series D2 Preferred Stock and Common Stock |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Equity and long-term investments at fair value |  |  | $ 3.2 |  |  |  | $ 3.2
Significant Unobservable Inputs, Level 3 | Backsolve Valuation |  |  |  |  |  |  |
Equity Investment |  |  |  |  |  |  |
Expected holding period |  |  | 2 years |  |  |  |
Risk free interest rate |  |  | 3.20% |  |  |  |
Dividend yield |  |  | 0.00% |  |  |  |
Estimated volatility |  |  | 122.00% |  |  |  |

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