XML 32 R71.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Shareholder Rights Plan - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014
Class Of Warrant Or Right [Line Items] |
Number of shares of preferred stock authorized | 4,991,000 us-gaap_PreferredStockSharesAuthorized
Exercise price of preferred stock purchase right | $ 20.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Percentage of Common Stock ownership to make rights exercisable | 15.00%thrm_PercentageOfCommonStockPersonOrGroupAcquiresToMakeRightsExercisable
Series B Preferred Stock |
Class Of Warrant Or Right [Line Items] |
Preferred shares entitled to be purchased per right | 0.001 thrm_NumberOfPreferredSharesEntitledToBePurchasedPerStockPurchaseRight / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember

X
- Definition Number of preferred shares entitled to be purchased per stock purchase right. + References No definition available. + Details
Name: | thrm_NumberOfPreferredSharesEntitledToBePurchasedPerStockPurchaseRight
Namespace Prefix: | thrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of common stock person or group acquires to make rights exercisable. + References No definition available. + Details
Name: | thrm_PercentageOfCommonStockPersonOrGroupAcquiresToMakeRightsExercisable
Namespace Prefix: | thrm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) 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 210.5-02.28) -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 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |