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Stockholders' Equity - Warrant Activity (Details) - $ / shares | Dec. 31, 2023 | Dec. 31, 2022 | Oct. 31, 2021 | Dec. 31, 2018
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Class of Warrant or Right [Line Items] |  |  |  |
Number of warrants (in shares) | 0 | 132,651 |  |
2020 Convertible Notes warrant |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Cash exercise price per share (in dollars per share) |  | $ 71.23 | $ 71.23 |
Number of warrants (in shares) | 0 | 56,226 |  |
Common stock warrants (Series F) |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Cash exercise price per share (in dollars per share) |  | $ 461.00 |  | $ 461
Number of warrants (in shares) | 0 | 7,548 |  |
Public Warrants (PHUNW) |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Cash exercise price per share (in dollars per share) |  | $ 575.00 |  |
Number of warrants (in shares) | 0 | 35,226 |  |
Private Placement Warrants |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Cash exercise price per share (in dollars per share) |  | $ 575.00 |  |
Number of warrants (in shares) | 0 | 33,168 |  |
Unit Purchase Option Warrants |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Cash exercise price per share (in dollars per share) |  | $ 575.00 |  |
Number of warrants (in shares) | 0 | 483 |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-3 + Details
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