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Fair Value Measurements - Additional information (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Aug. 30, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Investment in equity securities |  | $ 258,000 | $ 1,145,000 |
Assessed fair value of ordinary shares | $ 400,000 | 400,000 |  |
Gain on convertible note and ordinary shares |  | $ 300,000 |  |
Warrants outstanding | 2,500,000 | 2,500,000 |  |
March 2024 Public Offering |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Warrants outstanding | 2,500,000 | 2,500,000 |  |
Imugene Convertible Note |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Aggregate principal amount | $ 13,000,000 | $ 13,000,000 |  |
Debt instrument maturity date |  | Aug. 30, 2024 |  |
2024 Term Loan |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Final payment fee paid | $ 225,000 | $ 225,000 |  |
iECURE | Equity Issuance Agreement |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Investment in equity securities |  | 0 |  |
Cash | Imugene Convertible Note |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Aggregate principal amount |  |  |  | $ 9,750,000
Revolving Credit Facility [Member] | Seventh Amendment To Revolving Line [Member] | Maximum |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Change in fair value of final payment fee |  | $ 100,000 |  |
Ordinary Shares, Imugene Limited |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Number of shares sold | 72,312,592 |  |  |
Ordinary Shares, Imugene Limited | Imugene Convertible Note |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |
Aggregate principal amount |  |  |  | $ 3,250,000
Shares received on mature of convertible note |  |  |  | 87,999,186

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