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Nature of Business and Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2021 | Dec. 31, 2024 | Jan. 01, 2024
Nature of Business [Line Items] |  |  |  |  |  |  |  |
Restricted cash (included in Other assets) |  | $ 350 |  | $ 350 |  |  | $ 350 |
Payment terms |  |  |  | 30 days |  |  |  |
Accounts receivable, net |  | 5,000 |  | $ 5,000 |  |  | $ 5,087 | $ 3,600
Revenue recognition, rebates recognized |  | 200 | $ 100 | 600 | $ 300 |  |  |
Research and development | [1] | 5,176 | $ 4,219 | 12,395 | $ 14,729 |  |  |
Nelitolimod |  |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |  |
Research and development |  | $ 2,100 |  | $ 2,100 |  |  |  |
University Of Texas MD Anderson Cancer Center |  |  |  |  |  |  |  |
Nature of Business [Line Items] |  |  |  |  |  |  |  |
Alliance program, term |  |  |  |  |  | 5 years |  |
[1] | (1) Amounts presented in prior 2025 interim periods have been revised in the year to date ended September 30, 2025 to align expense classification for the year to date period.

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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-18 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-14 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 730 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482916/730-10-50-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 912 -SubTopic 730 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479532/912-730-25-1 + Details
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