XML 37 R24.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Oil And Gas Properties (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Oil And Gas Properties [Abstract] |
Schedule Of Oil And Gas Properties |
|  | December 31,
|  | 2015 |  | 2014
Oil and gas properties, at cost, net of impairment |  | $ | 8,286 |  | $ | 49,388
Unevaluated properties, at cost |  |  | 552 |  |  | 462
Accumulated depreciation, depletion and amortization |  |  | — |  |  | (24,437)
Oil and gas properties, net |  | $ | 8,838 |  | $ | 25,413

X
- Definition Oil And Gas Property Full Cost Method Net [Table Text Block] + References No definition available. + Details
Name: | tgc_OilAndGasPropertyFullCostMethodNetTableTextBlock
Namespace Prefix: | tgc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration