Cover Page - shares	6 Months Ended
	Jun. 30, 2020	Sep. 17, 2020
Cover [Abstract]
Document Type	10-Q
Entity Registrant Name	ACUTUS MEDICAL, INC.
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001522860
Document Quarterly Report	true
Document Transition Report	false
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2210 Faraday Ave.
Entity Address, Address Line Two	Suite 100,
Entity File Number	001-39430
Entity Tax Identification Number	45-1306615
Entity Address, City or Town	Carlsbad
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92008
City Area Code	442
Local Phone Number	232-6080
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	AFIB
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		27,826,408