Number of warrants or rights issued.

No definition available.

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Namespace Prefix:	ctso_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Price of the entity's common stock which would be required to be attained for revision of exercise price of warrants or rights.

+ References

No definition available.

+ Details

Name:	ctso_ClassOfWarrantOrRightRevisionOfExercisePriceOfWarrantsOrRightsStockPriceTrigger
Namespace Prefix:	ctso_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=ctso_LoanAndSecurityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=ctso_AvenuePartnersMember
Namespace Prefix:
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Period Type:

STOCK-BASED COMPENSATION - Warrants (Details) - $ / shares	Jun. 28, 2024	Dec. 31, 2025	Nov. 13, 2025	Feb. 24, 2025	Dec. 13, 2023
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS
Number of shares to be purchased		5,780,701			2,706,561
Warrant exercise price per share (in dollars per share)				$ 1.13	$ 2
Stock price trigger for revision of exercise price of warrants (in dollars per share)	$ 0.79
Loan and security agreement
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS
Warrant exercise price per share (in dollars per share)	$ 0.79	$ 0.79
Class of warrant issued	1,645,569
Warrants to purchase shares		1,645,569
Avenue Partners
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS
Warrant exercise price per share (in dollars per share)			$ 0.7
Warrants to purchase shares			1,428,571