Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Oct. 31, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Registrant Name	MASTECH DIGITAL, INC.
Entity Central Index Key	0001437226
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Title of 12(b) Security	Common Stock
Trading Symbol	MHH
Security Exchange Name	NYSEAMER
Entity Address, State or Province	PA
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		11,599,138
Entity File Number	001-34099
Entity Incorporation, State or Country Code	PA
Entity Address, Address Line One	1305 Cherrington Parkway
Entity Address, City or Town	Moon Township
Entity Address, Postal Zip Code	15108
Entity Tax Identification Number	26-2753540
City Area Code	412
Local Phone Number	787-2100
Entity Address, Address Line Two	Building 210
Entity Address, Address Line Three	Suite 400