Document And Entity Information - shares	9 Months Ended
	Oct. 01, 2021	Nov. 12, 2021
Document Information Line Items
Entity Registrant Name	ATLAS TECHNICAL CONSULTANTS, INC.
Trading Symbol	ATCX
Document Type	10-Q
Current Fiscal Year End Date	--01-01
Amendment Flag	false
Entity Central Index Key	0001751143
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Oct. 01, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-38745
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-0808563
Entity Address, Address Line One	13215 Bee Cave Parkway
Entity Address, Address Line Two	Building B
Entity Address, Address Line Three	Suite 230
Entity Address, City or Town	Austin
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	78738
City Area Code	(512)
Local Phone Number	851-1501
Title of 12(b) Security	Class A common stock, $0.0001 par value per share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Class A Common Stock
Document Information Line Items
Entity Common Stock, Shares Outstanding		33,616,212
Class B Common Stock
Document Information Line Items
Entity Common Stock, Shares Outstanding		3,347,101