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v2.4.1.9

Contingencies (Details) (Litigation Settled [Member]) | 0 Months Ended |  |
--- | --- | --- | ---
Jun. 25, 2012 co-defendant complaint | Oct. 05, 2012 complaint | Jul. 27, 2012 complaint
Loss Contingencies [Line Items] |  |  |
Number of complaints filed | 4 us-gaap_LossContingencyNewClaimsFiledNumber |  |
Number of co-defendants | 1 gntx_LossContingencyNumberOfCoDefendants |  |
Total number of customers cited as possible co-defendants | 2 gntx_LossContingencyTotalNumberOfCustomersCitedAsPossibleCoDefendants |  |
Number of complaints served |  |  | 4 gntx_LossContingencyNumberOfComplaintsServed
Number of complains answered |  | 4 gntx_LossContingencyNumberOfComplaintsAnswered |
SmartBeam [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of complaints filed | 2 us-gaap_LossContingencyNewClaimsFiledNumber / us-gaap_LitigationCaseAxis = gntx_PatentInfringementSmartbeamMember / us-gaap_LitigationStatusAxis = gntx_LitigationSettledMember |  |
Number of patents infringed upon | 1 us-gaap_LossContingencyPatentsAllegedlyInfringedNumber / us-gaap_LitigationCaseAxis = gntx_PatentInfringementSmartbeamMember / us-gaap_LitigationStatusAxis = gntx_LitigationSettledMember |  |
Monitoring System Products [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Number of complaints filed | 2 us-gaap_LossContingencyNewClaimsFiledNumber / us-gaap_LitigationCaseAxis = gntx_PatentInfringementMonitoringSystemProductsMember / us-gaap_LitigationStatusAxis = gntx_LitigationSettledMember |  |
Number of patents infringed upon | 2 us-gaap_LossContingencyPatentsAllegedlyInfringedNumber / us-gaap_LitigationCaseAxis = gntx_PatentInfringementMonitoringSystemProductsMember / us-gaap_LitigationStatusAxis = gntx_LitigationSettledMember |  |

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- Definition Loss Contingency, Number of Co-defendants + References No definition available. + Details
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- Definition Loss Contingency, Number of Complaints Answered + References No definition available. + Details
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- Definition Loss Contingency, Number of Complaints Served + References No definition available. + Details
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- Definition Loss Contingency, Total Number of Customers cited as Possible Co-defendants + References No definition available. + Details
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- Details
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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
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- Definition Number of another entity's patents that the entity has allegedly infringed. + References No definition available. + Details
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