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Stock Option Plans - Schedule of Stock Option Activity (Details) (Intrexon Stock Option Plan, USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Intrexon Stock Option Plan |  |  |
Number of shares |  |  |
Balances at beginning of period | 8,323,544 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Granted | 950,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Exercised | (204,487)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Forfeited | (118,036)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Expired | (142)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Balances at period end | 8,951,379 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  | 8,323,544 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember
Exercisable at end of period | 2,568,344 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Vested and Expected to Vest at end of period | 7,447,767 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember | [1] |
Weighted average exercise price (usd per share) |  |  |
Balances at beginning of period | $ 22.59 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Granted | $ 43.17 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Exercised | $ (12.56)us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Forfeited | $ (24.76)us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Expired | $ (7.12)us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Balances at period end | $ 24.97 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  | $ 22.59 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember
Exercisable, weighted average exercise price, at end of period | $ 18.74 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember |  |
Vested and Expected to Vest, weighted average exercise price at end of period | $ 24.20 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = xon_IntrexonStockOptionPlanMember | [1] |
Weighted average remaining contractual term |  |  |
Balances at period end, weighted average remaining contractual period | 8 years 5 months 27 days |  | 8 years 7 months 21 days
Exercisable at period end, weighted average remaining contractual period | 7 years 3 months 26 days |  |
Vested and Expected to Vest at period end, weighted average remaining contractual period | 8 years 4 months 17 days | [1] |
[1] | The number of stock options expected to vest takes into account an estimate of expected forfeitures.

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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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