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

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- 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

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- 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

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- 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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Balance Type: | debit
Period Type: | instant

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- Definition Term of agreement or program of share issuance. + References No definition available. + Details
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- 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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- 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 + Details
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Period Type: | instant

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- 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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Period Type: | duration

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- 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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