Intangible Assets	9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Note 8. Intangible Assets In June 2014, the Company completed the acquisition of substantially all of the assets of EGEN, Inc., an Alabama corporation (“EGEN”), which changed its company name to EGWU, Inc. after the closing of the acquisition (the “EGEN Acquisition”). The Company acquired EGEN’s rights, title and interest in and to substantially all of the assets of EGEN, including cash and cash equivalents, patents, trademarks and other intellectual property rights, clinical data, certain contracts, licenses and permits, equipment, furniture, office equipment, furnishings, supplies and other tangible personal property. In addition, CLSN Laboratories assumed certain specified liabilities of EGEN, including the liabilities arising out of the acquired contracts and other assets relating to periods after the closing date. Acquired In-process Research and Development Acquired in-process research and development (“IPR&D”) consists of EGEN’s drug technology platforms: TheraPlas and TheraSilence. The fair value of the IPR&D drug technology platforms was estimated to be $24.2 million as of the acquisition date. As of the closing of the acquisition, the IPR&D was considered indefinite lived intangible assets and will not be amortized. IPR&D is reviewed for impairment at least annually and whenever events or changes in circumstances indicate that the carrying value of the assets might not be recoverable. The Company’s IPR&D consisted of three core elements, its RNA delivery system, its glioblastoma multiforme cancer drug candidate and its ovarian cancer indication. As of December 31, 2022, the Company assessed whether there were indicators of impairment for the Company’s IPR&D and determined that the IPR&D asset was impaired during that period. Due to the continuing deterioration of public capital markets in the biotech industry in 2022 and its impact on market capitalization rates in this sector, IPR&D was reviewed for impairment. Having conducted a quantitative analysis of its IPR&D assets, the Company concluded the IPR&D asset was impaired during the fourth quarter of 2022. As of December 31, 2022, the Company wrote off the $13.4 million carrying value of this asset, thereby recognizing a non-cash charge of $13.4 million in the fourth quarter of 2022.

Intangible Assets

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Note 8. Intangible Assets

In June 2014, the Company completed the acquisition of substantially all of the assets of EGEN, Inc., an Alabama corporation (“EGEN”), which changed its company name to EGWU, Inc. after the closing of the acquisition (the “EGEN Acquisition”). The Company acquired EGEN’s rights, title and interest in and to substantially all of the assets of EGEN, including cash and cash equivalents, patents, trademarks and other intellectual property rights, clinical data, certain contracts, licenses and permits, equipment, furniture, office equipment, furnishings, supplies and other tangible personal property. In addition, CLSN Laboratories assumed certain specified liabilities of EGEN, including the liabilities arising out of the acquired contracts and other assets relating to periods after the closing date.

Acquired In-process Research and Development

Acquired in-process research and development (“IPR&D”) consists of EGEN’s drug technology platforms: TheraPlas and TheraSilence. The fair value of the IPR&D drug technology platforms was estimated to be $24.2 million as of the acquisition date. As of the closing of the acquisition, the IPR&D was considered indefinite lived intangible assets and will not be amortized. IPR&D is reviewed for impairment at least annually and whenever events or changes in circumstances indicate that the carrying value of the assets might not be recoverable. The Company’s IPR&D consisted of three core elements, its RNA delivery system, its glioblastoma multiforme cancer drug candidate and its ovarian cancer indication.

As of December 31, 2022, the Company assessed whether there were indicators of impairment for the Company’s IPR&D and determined that the IPR&D asset was impaired during that period. Due to the continuing deterioration of public capital markets in the biotech industry in 2022 and its impact on market capitalization rates in this sector, IPR&D was reviewed for impairment. Having conducted a quantitative analysis of its IPR&D assets, the Company concluded the IPR&D asset was impaired during the fourth quarter of 2022. As of December 31, 2022, the Company wrote off the $13.4 million carrying value of this asset, thereby recognizing a non-cash charge of $13.4 million in the fourth quarter of 2022.