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SHAREHOLDERS' EQUITY (Issuance of Shares) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Ordinary shares, shares authorized	100,000,000us-gaap_CommonStockSharesAuthorized	100,000,000us-gaap_CommonStockSharesAuthorized
Amount raised, net of issuance expenses	$ 70,718us-gaap_StockIssuedDuringPeriodValueNewIssues	$ 19,704us-gaap_StockIssuedDuringPeriodValueNewIssues	$ 6,267us-gaap_StockIssuedDuringPeriodValueNewIssues
At The Market Offering Program [Member]
Ordinary shares, shares authorized	6,000,000us-gaap_CommonStockSharesAuthorized / us-gaap_StatementScenarioAxis = cgen_AtTheMarketOfferingProgramMember
Maximum authorized proceeds from issuance of common stock	40,000cgen_MaximumAuthorizedProceedsFromIssuanceOfCommonStock / us-gaap_StatementScenarioAxis = cgen_AtTheMarketOfferingProgramMember
Issuance of shares, net, shares	363,090us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementScenarioAxis = cgen_AtTheMarketOfferingProgramMember
Amount raised, net of issuance expenses	3,801us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementScenarioAxis = cgen_AtTheMarketOfferingProgramMember
Agreement [Member]
Ordinary shares, shares authorized	6,000,000us-gaap_CommonStockSharesAuthorized / us-gaap_StatementScenarioAxis = cgen_AgreementMember
Issuance of shares, net, shares	6,900,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementScenarioAxis = cgen_AgreementMember
Ordinary shares issued, price	$ 10.50us-gaap_SharesIssuedPricePerShare / us-gaap_StatementScenarioAxis = cgen_AgreementMember
Payment of underwriting discounts and commissions	5,533us-gaap_PaymentsOfStockIssuanceCosts / us-gaap_StatementScenarioAxis = cgen_AgreementMember
Agreement term	30 days
Agreement, additional shares issuable	900,000cgen_AgreementOptionAdditionalNumberOfSharesIssuable / us-gaap_StatementScenarioAxis = cgen_AgreementMember
Grant date fair value	1,576cgen_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue / us-gaap_StatementScenarioAxis = cgen_AgreementMember
Amount raised, net of issuance expenses	$ 66,917us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementScenarioAxis = cgen_AgreementMember

X

- Definition

Additional number of shares issuable under the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgen_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum Authorized Proceeds From Issuance Of Common Stock

+ References

No definition available.

+ Details

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Namespace Prefix:	cgen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the amount of grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Term of agreement or program of share issuance.

+ References

No definition available.

+ Details

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Namespace Prefix:	cgen_
Data Type:	xbrli:durationItemType
Balance Type:	na
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X

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

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

X

- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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Balance Type:	credit
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X

- Definition

Amount per share or per unit of equity securities issued by non-development stage entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

X

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

+ Details

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- Details

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