Cover |
Oct. 23, 2025 |
|---|---|
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 23, 2025 |
| Entity File Number | 0-35737 |
| Entity Registrant Name | Northwest Biotherapeutics, Inc. |
| Entity Central Index Key | 0001072379 |
| Entity Tax Identification Number | 94-3306718 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 4800 Montgomery Lane |
| Entity Address, Address Line Two | Suite 800 |
| Entity Address, City or Town | Bethesda |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 20814 |
| City Area Code | 240 |
| Local Phone Number | 497-9024 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value, $0.001 per share |
| Trading Symbol | NWBO |
| Entity Emerging Growth Company | false |
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