Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Sep. 07, 2021	Jun. 30, 2020
Document Information Line Items
Entity Registrant Name	PRESIDENTIAL REALTY CORP/DE/
Document Type	10-K/A
Current Fiscal Year End Date	--12-31
Entity Public Float			$ 176,040
Amendment Flag	true
Amendment Description	This amendment No. 1 on Form 10-K/A (Amendment No. 1) is being filed to amend our Annual Report Form 10-K for the annual period ended December 31, 2020 (Original Filing), filed with the U.S. Securities and Exchange Commission on September 20, 2021 (Original Filing Date). The sole purpose of Amendment No. 1 is to correct a typographical error on the previously filed auditors report. Except as described above, no changes have been made to the Original filing, and this Amendment No. 1 does not modify, amend or update any other information contained in the Original Filing. This Amendment No. 1 does not reflect events that may have occurred subsequent to the Original Filing Date. Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this Amendment No. 1 also contains the inclusion of the certifications required under Section 302 of the Sarbanes-Oxley Act of 2002 in Item 15 of Part IV. Because no financial statements have been included in this Amendment No. 1 and this Amendment No. 1 does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted. This Amendment No. 1 does not include new certifications under Section 906 of the Sarbanes-Oxley Act of 2002 because no financial statements are included in this Amendment No. 1.
Entity Central Index Key	0000731245
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Annual Report	true
Entity File Number	001-08594
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	No
Class A Common Stock
Document Information Line Items
Entity Common Stock, Shares Outstanding		442,533
Class B Common Stock
Document Information Line Items
Entity Common Stock, Shares Outstanding		4,746,147