XML 80 R42.htm IDEA: XBRL DOCUMENT
v3.20.1

Oil And Gas Properties (Schedule Of Oil And Gas Properties) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Oil And Gas Properties [Abstract] |  |
Oil and gas properties | $ 6,751 | $ 6,503
Unevaluated properties |  | 23
Accumulated depreciation, depletion and amortization | (2,366) | (1,722)
Oil and gas properties, net | $ 4,385 | $ 4,804

X
- Definition Oil And Gas Property Unevaluated Properties + References No definition available. + Details
Name: | tgc_OilAndGasPropertyUnevaluatedProperties
Namespace Prefix: | tgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Depletion of oil and gas property carried under the full cost method. + References No definition available. + Details
Name: | us-gaap_OilAndGasPropertyFullCostMethodDepletion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Oil and gas properties, gross, carried under the full cost method. + References No definition available. + Details
Name: | us-gaap_OilAndGasPropertyFullCostMethodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Oil and gas properties, net of depletion, carried under the full cost method. + References No definition available. + Details
Name: | us-gaap_OilAndGasPropertyFullCostMethodNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant