| Document And Entity Information | May 06, 2022 |
| Document Information [Line Items] | |
| Entity, Registrant Name | Parkway Acquisition Corp. |
| Document, Type | 8-K |
| Document, Period End Date | May 6, 2022 |
| Entity, Incorporation, State or Country Code | VA |
| Entity, File Number | 333-209052 |
| Entity, Tax Identification Number | 47-5486027 |
| Entity, Address, Address Line One | 101 Jacksonville Circle |
| Entity, Address, City or Town | Floyd |
| Entity, Address, State or Province | VA |
| Entity, Address, Postal Zip Code | 24091 |
| City Area Code | 540 |
| Local Phone Number | 745-4191 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001657642 |
