| Cover | Aug. 12, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 12, 2021 |
| Entity File Number | 001-39531 |
| Entity Registrant Name | PROCESSA PHARMACEUTICALS, INC. |
| Entity Central Index Key | 0001533743 |
| Entity Tax Identification Number | 45-1539785 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 7380 Coca Cola Drive |
| Entity Address, Address Line Two | Suite 106 |
| Entity Address, City or Town | Hanover |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 21076 |
| City Area Code | (443) |
| Local Phone Number | 776-3133 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | PCSA |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
