Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 12, 2021
Document Information [Line Items]
Entity Central Index Key	0001657642
Entity Registrant Name	Parkway Acquisition Corp.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	333-209052
Entity Incorporation, State or Country Code	VA
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		5,981,100