XML 30 R14.htm IDEA: XBRL DOCUMENT
v3.22.1

License Agreement | 3 Months Ended
--- | ---
Mar. 31, 2022
License Agreement [Abstract] |
License Agreement |
8. | License Agreements
UT Health Science Center at San Antonio (“UTHSA”) License Agreement On December 31, 2021, the Company entered into a Patent and Know-How License Agreement (the “UTHSA License Agreement”) with The University of Texas Health Science Center at San Antonio, pursuant to which UTHSA granted the Company an irrevocable, perpetual, exclusive, fully paid-up license, with the right to sublicense and to make, develop, commercialize and otherwise exploit certain patents, know-how and technology related to the development of biodegradable alginate microspheres (BAM) containing nanoliposomes loaded with imaging and/or therapeutic payloads. Pursuant to the UTHSA License Agreement, the Company was required to make an upfront payment, which was recorded as in-process research and development acquired in the condensed statement of operations for the year ended December 31, 2021. The upfront payment was paid in cash in January 2022. NanoTx License Agreement On March 29, 2020, the Company and NanoTx, Corp. (“NanoTx”) entered into a Patent and Know-How License Agreement (the “NanoTx License Agreement”), pursuant to which NanoTx granted the Company an irrevocable, perpetual, exclusive, fully paid-up license, with the right to sublicense and to make, develop, commercialize and otherwise exploit certain patents, know-how and technology related to the development of radiolabeled nanoliposomes. On May 7, 2020, all closing conditions under the NanoTx License Agreement were satisfied and the Company paid an upfront cash payment and issued 230,769 shares of its common stock to NanoTx. Cash and the fair value of common stock issued is recorded as in-process research and development expenses, pursuant to authoritative literature for asset acquisition, in the statement of operations and comprehensive loss for the year ended December 31, 2020.

X
- Definition License agreement abstract. + References No definition available. + Details
Name: | pstv_LicenseAgreementAbstract
Namespace Prefix: | pstv_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of accounting policy for license agreement. + References No definition available. + Details
Name: | pstv_LicenseAgreementDisclosureTextBlock
Namespace Prefix: | pstv_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration