Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 23, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-31822
Entity Registrant Name	ACCELERATE DIAGNOSTICS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-1072256
Entity Address, Address Line One	3950 South Country Club Road
Entity Address, Address Line Two	Suite 470
Entity Address, City or Town	Tucson
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85714
City Area Code	520
Local Phone Number	365-3100
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	AXDX
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 480.1
Entity Common Stock, Shares Outstanding		59,325,578
Documents Incorporated by Reference	Portions of the definitive proxy statement relating to the registrant’s 2021 Annual Meeting of Stockholders are incorporated by reference in Part III of this Form 10-K.
Entity Central Index Key	0000727207
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020