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Manufactured Methane Facilities (Tables) | 12 Months Ended
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Dec. 31, 2015
Manufactured Methane Facilities [Abstract] |
Schedule Of The Manufactured Methane Facilities |
|  | December 31,
|  | 2015 |  | 2014
Manufactured Methane facilities, at cost, net of impairment |  | $ | 1,634 |  | $ | 1,634
Accumulated depreciation |  |  | (60) |  |  | —
Manufactured Methane facilities, net |  | $ | 1,574 |  | $ | 1,634

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- Definition Methane Facilities [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | tgc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Methane Project [Abstract] + References No definition available. + Details
Name: | tgc_MethaneProjectAbstract
Namespace Prefix: | tgc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration