XML 23 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Accounting for Stock Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Fair Value of Option on Date of Grant | The following assumptions were used for options issued in the following periods:
|  | 2012 |  |  | 2011 |  |  | 2010 |
Expected volatility |  |  | 47 | % |  |  | 49 - 55 | % |  |  | 48 | %
Weighted average expected volatility |  |  | 47 | % |  |  | 55 | % |  |  | 48 | %
Expected lives |  |  | 3 yrs. |  |  |  | 3 - 5 yrs. |  |  |  | 5 yrs. |
Risk-free interest rate |  |  | 0.43 | % |  |  | 0.37 - 0.94 | % |  |  | 2.69 | %
Expected dividend yield |  |  | none |  |  |  | none |  |  |  | none |
Summarizes Stock Option Activity | The following table summarizes stock option activity during the three year period ended December 31, 2012:
Options |  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2009 |  |  | 2,508,828 |  |  | $ | 5.71 |  |  |  |  |  |  |  |  |
Granted |  |  | 198,343 |  |  |  | 9.29 |  |  |  |  |  |  |  |  |
Exercised |  |  | (548,331 | ) |  |  | 4.46 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (26,334 | ) |  |  | 9.26 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2010 |  |  | 2,132,506 |  |  | $ | 6.34 |  |  |  | 7.06 |  |  | $ | 8,444 |
Granted |  |  | 609,642 |  |  |  | 12.31 |  |  |  |  |  |  |  |  |
Exercised |  |  | (571,964 | ) |  |  | 5.88 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (6,359 | ) |  |  | 5.66 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 2,163,825 |  |  | $ | 8.12 |  |  |  | 6.74 |  |  | $ | 15,408 |
Granted |  |  | 160,000 |  |  |  | 12.88 |  |  |  |  |  |  |  |  |
Exercised |  |  | (176,896 | ) |  |  | 4.46 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (17,000 | ) |  |  | 4.05 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2012 |  |  | 2,129,929 |  |  | $ | 8.82 |  |  |  | 6.99 |  |  | $ | 5,640 |
Exercisable at December 31, 2010 |  |  | 1,257,858 |  |  | $ | 7.20 |  |  |  | 6.20 |  |  | $ | 3,902 |
Exercisable at December 31, 2011 |  |  | 1,222,959 |  |  | $ | 7.23 |  |  |  | 6.07 |  |  | $ | 9,831 |
Exercisable at December 31, 2012 |  |  | 1,520,720 |  |  | $ | 7.57 |  |  |  | 6.20 |  |  | $ | 5,966 |

X
- Definition Schedule Of Fair Value Of Options Grant [Text Block] + References No definition available. + Details
Name: | thrm_ScheduleOfFairValueOfOptionsGrantTextBlock
Namespace Prefix: | thrm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary Of Stock Option Activity Under Plan Table [Text Block] + References No definition available. + Details
Name: | thrm_SummaryOfStockOptionActivityUnderPlanTableTextBlock
Namespace Prefix: | thrm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration