Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 05, 2021
Document Type	10-Q/A
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Entity File Number	001-39677
Entity Registrant Name	CONX CORP.
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	85-2728630
Entity Address, Address Line One	5701 S
Entity Address, Address Line Two	Santa Fe Dr.
Entity Address, City or Town	Littleton
Entity Address State Or Province	CO
Entity Address, Postal Zip Code	80120
City Area Code	303
Local Phone Number	472-1542
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Central Index Key	0001823000
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	true
Amendment Description	Amendment No. 1
Units
Title of 12(b) Security	Units, each consisting of one share of Class A common stock and one-fourth of one redeemable warrant
Trading Symbol	CONXU
Security Exchange Name	NASDAQ
Class A - Common stock
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	CONX
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		75,030,000
Warrants.
Title of 12(b) Security	Warrants, each whole warrant exercisable for one share of Class A common stock, each at an exercise price of $11.50 per share
Trading Symbol	CONXW
Security Exchange Name	NASDAQ
Class B - Common stock
Entity Common Stock, Shares Outstanding		18,750,000