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Fair Value Measurements - Schedule of Estimated Fair Value Determined Using Option Pricing Model Assumptions (Details) - Series U Warrants [Member] - $ / shares | Sep. 30, 2021 | Dec. 31, 2020
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Warrants expected term | 5 years |
Level 3 [Member] | Expected Term [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Warrants expected term | 3 years | 3 years 9 months
Level 3 [Member] | Common Stock Market Price [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Warrants measurement input | 1.91 | 2.02
Level 3 [Member] | Risk-free Interest Rate [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Warrants measurement input | 0.53 | 0.24
Level 3 [Member] | Expected Volatility [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Warrants measurement input | 139 | 149
Level 3 [Member] | Resulting Fair Value (Per Warrant) [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Warrants measurement input | 1.25 | 1.56

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