Litigation Funding Agreement	9 Months Ended
Litigation Funding Agreement	Sep. 30, 2025
Litigation Funding Agreement [Abstract]
Litigation Funding Agreement	Note 7 – Litigation Funding Agreement In 2017, the Company entered into a Litigation Funding Agreement (the “2017 LFA”) with Mr. R.A. Bianco, to provide litigation funding to the Company for litigation costs in connection with the Company’s legal proceedings relating to the Company’s equity investment in the 111 West 57^th Property. In 2019, after receiving approval from the Special Committee, the Company and Mr. R.A. Bianco entered into an amendment to the 2017 LFA (the “2019 LFA Amendment”). In summary the 2019 LFA Amendment provided for the release of Mr. R.A. Bianco from all further funding obligations under the 2017 LFA and that, in the event the Company receives any litigation proceeds from the 111 West 57^th Litigation, such litigation proceeds shall be distributed as follows: (i) first, 100% to the Company in an amount equal $7,500,000; and (ii) thereafter, any additional amounts shall be distributed (a) 75% to the Company and (b) 25% to Mr. R.A. Bianco.

AmBase Corp 10-Q