Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 09, 2021	Jun. 30, 2020
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Entity File Number	001-36792
ICFR Auditor Attestation Flag	true
Entity Registrant Name	CYTOSORBENTS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	98-0373793
Entity Address, Address Line One	7 Deer Park Drive
Entity Address, Address Line Two	Suite K
Entity Address, City or Town	Monmouth Junction
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08852
City Area Code	732
Local Phone Number	329-8885
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	CTSO
Security Exchange Name	NASDAQ
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		43,263,772
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0001175151
Amendment Flag	false
Entity Public Float			$ 306,285,000
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No