Cover - shares	6 Months Ended
	Jun. 30, 2022	Aug. 05, 2022
Entity Addresses [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Entity File Number	001-39040
Entity Registrant Name	AST SPACEMOBILE, INC.
Entity Central Index Key	0001780312
Entity Tax Identification Number	84-2027232
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	Midland Intl. Air & Space Port
Entity Address, Address Line Two	2901 Enterprise Lane
Entity Address, City or Town	Midland
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	79706
City Area Code	432
Local Phone Number	276-3966
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Common Class A [Member]
Entity Addresses [Line Items]
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	ASTS
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		53,164,732
Warrants exercisable for one share of Class A common stock at an exercise price of $11.50
Entity Addresses [Line Items]
Title of 12(b) Security	Warrants exercisable for one share of Class A common stock at an exercise price of $11.50
Trading Symbol	ASTSW
Security Exchange Name	NASDAQ
Common Class B [Member]
Entity Addresses [Line Items]
Entity Common Stock, Shares Outstanding		51,636,922
Common Class C [Member]
Entity Addresses [Line Items]
Entity Common Stock, Shares Outstanding		78,163,078