XML 18 R54.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stock Options (Schedule Of Stock Options Outstanding And Exercisable) (Details) (USD $) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.57 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 0.59 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 0.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 0.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options Outstanding | 900,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 870,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,372,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 1,471,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options Exercisable | 900,250 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber |  |  |
$0.50 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.50 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan4Member |  |  |
Options Outstanding | 400,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan4Member |  |  |
Weighted Average Remaining Contractual Life | 9 months 18 days |  |  |
Options Exercisable | 400,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan4Member |  |  |
$0.43 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.43 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan5Member |  |  |
Options Outstanding | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan5Member |  |  |
Weighted Average Remaining Contractual Life | 1 month 6 days |  |  |
Options Exercisable | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan5Member |  |  |
$0.44 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.44 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan6Member |  |  |
Options Outstanding | 94,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan6Member |  |  |
Weighted Average Remaining Contractual Life | 8 months 12 days |  |  |
Options Exercisable | 94,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan6Member |  |  |
$1.08 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 1.08 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan7Member |  |  |
Options Outstanding | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan7Member |  |  |
Weighted Average Remaining Contractual Life | 1 year 3 months 18 days |  |  |
Options Exercisable | 50,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan7Member |  |  |
$1.16 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 1.16 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan8Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan8Member |  |  |
Weighted Average Remaining Contractual Life | 1 year 3 months 18 days |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan8Member |  |  |
$0.84 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.84 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan9Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan9Member |  |  |
Weighted Average Remaining Contractual Life | 1 year 6 months |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan9Member |  |  |
$0.72 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.72 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan10Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan10Member |  |  |
Weighted Average Remaining Contractual Life | 1 year 9 months 18 days |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan10Member |  |  |
$0.75 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.75 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan11Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan11Member |  |  |
Weighted Average Remaining Contractual Life | 2 years |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan11Member |  |  |
$1.07 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 1.07 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan12Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan12Member |  |  |
Weighted Average Remaining Contractual Life | 2 years 3 months 18 days |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan12Member |  |  |
$0.81 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.81 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan13Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan13Member |  |  |
Weighted Average Remaining Contractual Life | 2 years 6 months |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan13Member |  |  |
$0.73 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.73 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan14Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan14Member |  |  |
Weighted Average Remaining Contractual Life | 2 years 9 months 18 days |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan14Member |  |  |
$0.64 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.64 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan15Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan15Member |  |  |
Weighted Average Remaining Contractual Life | 3 years |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan15Member |  |  |
$0.62 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.62 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan16Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan16Member |  |  |
Weighted Average Remaining Contractual Life | 3 years 2 months 12 days |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan16Member |  |  |
$0.48 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.48 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan17Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan17Member |  |  |
Weighted Average Remaining Contractual Life | 3 years 6 months |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan17Member |  |  |
$0.41 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.41 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan18Member |  |  |
Options Outstanding | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan18Member |  |  |
Weighted Average Remaining Contractual Life | 3 years 9 months 18 days |  |  |
Options Exercisable | 18,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan18Member |  |  |
$0.41 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.41 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan19Member |  |  |
Options Outstanding | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan19Member |  |  |
Weighted Average Remaining Contractual Life | 4 years |  |  |
Options Exercisable | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan19Member |  |  |
$0.48 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.48 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan20Member |  |  |
Options Outstanding | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan20Member |  |  |
Weighted Average Remaining Contractual Life | 4 years 2 months 12 days |  |  |
Options Exercisable | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan20Member |  |  |
$0.44 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.44 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan21Member |  |  |
Options Outstanding | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan21Member |  |  |
Weighted Average Remaining Contractual Life | 4 years 6 months |  |  |
Options Exercisable | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan21Member |  |  |
$0.44 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Weighted Average Exercise Price | $ 0.44 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_PlanNameAxis = tgc_Plan22Member |  |  |
Options Outstanding | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_PlanNameAxis = tgc_Plan22Member |  |  |
Weighted Average Remaining Contractual Life | 4 years 9 months 18 days |  |  |
Options Exercisable | 25,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber / us-gaap_PlanNameAxis = tgc_Plan22Member |  |  |

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