$RSRV
RESERVE PETROLEUM CO Stock $rsrv

$rsrv Overview Financials Valuation SEC Filings Company Website

2018 Form 10-K Financial Statement

#000143774919005801 Filed on March 27, 2019

Income Statement

Concept	2018	2017 Q4	2017
Revenue	$8.327M	$1.510M	$6.310M
YoY Change	31.98%	-30.73%	0.29%
Cost Of Revenue	$2.392M	$590.0K	$2.190M
YoY Change	9.21%	3.51%	2.3%
Gross Profit	$5.936M	$920.0K	$4.120M
YoY Change	44.09%	-42.86%	-0.74%
Gross Profit Margin	71.28%	60.93%	65.29%
Selling, General & Admin	$1.680M	$460.0K	$1.621M
YoY Change	3.61%	17.95%	2.54%
% of Gross Profit	28.29%	50.0%	39.35%
Research & Development	$195.1K	$350.0K	$883.6K
YoY Change	-77.92%	-800.0%	105.86%
% of Gross Profit	3.29%	38.04%	21.45%
Depreciation & Amortization	$2.104M	$500.0K	$2.133M
YoY Change	-1.38%	-23.08%	-21.57%
% of Gross Profit	35.44%	54.35%	51.79%
Operating Expenses	$6.370M	$1.310M	$6.828M
YoY Change	-6.7%	31.0%	-0.62%
Operating Profit	$1.957M	-$390.0K	-$518.3K
YoY Change	-477.63%	-163.93%	-10.56%
Interest Expense	$127.0K	-$30.00K	$552.6K
YoY Change	-77.03%	50.0%	130.62%
% of Operating Profit	6.49%
Other Income/Expense, Net	$47.72K	$0.00	$47.14K
YoY Change	1.23%	-100.0%	-0.82%
Pretax Income	$2.702M	-$750.0K	$103.1K
YoY Change	2520.21%	-297.37%	-140.1%
Income Tax	$387.9K	-$100.0K	-$582.6K
% Of Pretax Income	14.36%		-565.04%
Net Earnings	$2.314M	-$80.00K	$685.7K
YoY Change	237.43%	-128.57%	-914.11%
Net Earnings / Revenue	27.78%	-5.3%	10.87%
Basic Earnings Per Share
Diluted Earnings Per Share	$14.69M	-$500.0K	$4.346M
COMMON SHARES
Basic Shares Outstanding
Diluted Shares Outstanding	0.000		0.000

Balance Sheet

Concept	2018	2017 Q4	2017
SHORT-TERM ASSETS
Cash & Short-Term Investments	$23.13M	$21.14M	$21.70M
YoY Change	6.6%	-1.75%	-1.32%
Cash & Equivalents	$6.429M	$4.768M	$4.768M
Short-Term Investments	$16.70M	$16.37M	$16.93M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$846.4K	$829.8K	$829.8K
Other Receivables	$234.5K	$500.0K	$501.8K
Total Short-Term Assets	$24.21M	$23.03M	$23.03M
YoY Change	5.13%	-1.12%	-1.12%
LONG-TERM ASSETS
Property, Plant & Equipment	$11.18M	$10.65M	$10.65M
YoY Change	5.04%	-2.56%	-2.56%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$2.571M	$991.1K	$2.624M
YoY Change	-2.03%	20.49%	-3.85%
Other Assets
YoY Change
Total Long-Term Assets	$13.76M	$13.27M	$13.27M
YoY Change	3.64%	-2.82%	-2.82%
TOTAL ASSETS
Total Short-Term Assets	$24.21M	$23.03M	$23.03M
Total Long-Term Assets	$13.76M	$13.27M	$13.27M
Total Assets	$37.97M	$36.30M	$36.30M
YoY Change	4.59%	-1.75%	-1.75%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$318.4K	$235.0K	$235.0K
YoY Change	35.48%	45.29%	45.29%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$343.6K	$260.3K	$260.2K
YoY Change	32.04%	38.92%	38.92%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$2.832M	$3.000M	$3.003M
YoY Change	-5.72%	0.33%	0.48%
Total Long-Term Liabilities	$2.832M	$3.921M	$3.003M
YoY Change	-5.72%	-12.86%	0.48%
TOTAL LIABILITIES
Total Short-Term Liabilities	$343.6K	$260.3K	$260.2K
Total Long-Term Liabilities	$2.832M	$3.921M	$3.003M
Total Liabilities	$4.386M	$4.182M	$4.182M
YoY Change	4.88%	-10.79%	-10.79%
SHAREHOLDERS EQUITY
Retained Earnings		$33.50M
YoY Change		-0.31%
Common Stock		$157.4K
YoY Change		0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$1.533M
YoY Change		2.39%
Treasury Stock Shares		$27.07K
Shareholders Equity	$33.58M	$32.12M	$32.12M
YoY Change
Total Liabilities & Shareholders Equity	$37.97M	$36.30M	$36.30M
YoY Change	4.59%	-1.75%	-1.75%

Cashflow Statement

Concept	2018	2017 Q4	2017
OPERATING ACTIVITIES
Net Income	$2.314M	-$80.00K	$685.7K
YoY Change	237.43%	-128.57%	-914.11%
Depreciation, Depletion And Amortization	$2.104M	$500.0K	$2.133M
YoY Change	-1.38%	-23.08%	-21.57%
Cash From Operating Activities	$4.846M	$120.0K	$2.771M
YoY Change	74.86%	-92.05%	-0.17%
INVESTING ACTIVITIES
Capital Expenditures	-$2.788M	-$850.0K	-$2.689M
YoY Change	3.69%	19.72%	35.92%
Acquisitions
YoY Change
Other Investing Activities	$626.9K	$230.0K	-$2.513M
YoY Change	-124.94%	-104.79%	-55.54%
Cash From Investing Activities	-$2.161M	-$610.0K	-$5.202M
YoY Change	-58.46%	-88.93%	-31.83%
FINANCING ACTIVITIES
Cash Dividend Paid	$959.5K		$837.5K
YoY Change	14.57%		-9.13%
Common Stock Issuance & Retirement, Net	$64.80K		$35.83K
YoY Change	80.87%		-59.67%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.024M	-60.00K	-873.3K
YoY Change	17.29%	500.0%	-13.57%
NET CHANGE
Cash From Operating Activities	4.846M	120.0K	2.771M
Cash From Investing Activities	-2.161M	-610.0K	-5.202M
Cash From Financing Activities	-1.024M	-60.00K	-873.3K
Net Change In Cash	1.661M	-550.0K	-3.304M
YoY Change	-150.26%	-86.28%	-43.67%
FREE CASH FLOW
Cash From Operating Activities	$4.846M	$120.0K	$2.771M
Capital Expenditures	-$2.788M	-$850.0K	-$2.689M
Free Cash Flow	$7.634M	$970.0K	$5.460M
YoY Change	39.81%	-56.31%	14.85%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="display: inline; font-family: times new roman; font-size: 10pt"><div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:37.8pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;text-indent:-37.8pt;">Note <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">1</div> – <div style="display: inline; text-decoration: underline;">NATURE OF OPERATIONS</div></div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;"> </div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27.35pt;margin-right:2.15pt;margin-top:0pt;text-align:justify;">The Company is engaged in oil and natural gas exploration and development and minerals management with areas of concentration in Texas, Oklahoma, Kansas, Arkansas and South Dakota, a single business segment.</div></div>
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6428499
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018Q2	dei	Entity Public Float EntityPublicFloat	20938864
CY2018	rsrv	Cash Dividends Declared And Or Paid CashDividendsDeclaredAndOrPaid	5
CY2017	rsrv	Cash Dividends Declared And Or Paid CashDividendsDeclaredAndOrPaid	5
CY2017	rsrv	Cost Incurred Asset Retirement Obligation CostIncurredAssetRetirementObligation	39956
CY2018	rsrv	Change In Present Value Percent ChangeInPresentValuePercent	0.0325
CY2018	rsrv	Cost Incurred Asset Retirement Obligation CostIncurredAssetRetirementObligation	16470
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	945399
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1210271
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	918050
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1210271
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	918050
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	755618
CY2018	rsrv	Current Year Inflation Rate CurrentYearInflationRate	0.0408
CY2018Q4	rsrv	Deferred Tax Assets Gas Balance Receivable DeferredTaxAssetsGasBalanceReceivable	32352
CY2017Q4	rsrv	Deferred Tax Assets Gas Balance Receivable DeferredTaxAssetsGasBalanceReceivable	32352
CY2018Q4	rsrv	Deferred Tax Assets Geological And Geophysical Expense DeferredTaxAssetsGeologicalAndGeophysicalExpense	38367
CY2017Q4	rsrv	Deferred Tax Assets Geological And Geophysical Expense DeferredTaxAssetsGeologicalAndGeophysicalExpense	47539
CY2018Q4	rsrv	Deferred Tax Assets Net Leasehold Impairmentlosses DeferredTaxAssetsNetLeaseholdImpairmentlosses	127906
CY2017Q4	rsrv	Deferred Tax Assets Net Leasehold Impairmentlosses DeferredTaxAssetsNetLeaseholdImpairmentlosses	189867
CY2018Q4	rsrv	Deferred Tax Liabilities Intangible Drilling Costs DeferredTaxLiabilitiesIntangibleDrillingCosts	1741413
CY2017Q4	rsrv	Deferred Tax Liabilities Intangible Drilling Costs DeferredTaxLiabilitiesIntangibleDrillingCosts	1614470
CY2018Q4	rsrv	Deferred Tax Liabilities Revenue Accruals DeferredTaxLiabilitiesRevenueAccruals	72807
CY2017Q4	rsrv	Deferred Tax Liabilities Revenue Accruals DeferredTaxLiabilitiesRevenueAccruals	59561
CY2018Q4	rsrv	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Asset Retirement Obligation FutureNetCashFlowsRelatingToProvedOilAndGasReservesAssetRetirementObligation	1873939
CY2017Q4	rsrv	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Asset Retirement Obligation FutureNetCashFlowsRelatingToProvedOilAndGasReservesAssetRetirementObligation	1881972
CY2018Q4	rsrv	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production And Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionAndDevelopmentCosts	14212906
CY2017Q4	rsrv	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production And Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionAndDevelopmentCosts	12989835
CY2018	rsrv	Impairment Of Oil And Gas Cost Properties ImpairmentOfOilAndGasCostProperties	832651
CY2017	rsrv	Impairment Of Oil And Gas Cost Properties ImpairmentOfOilAndGasCostProperties	426822
CY2018	rsrv	Income From Equity And Other Investments Cf IncomeFromEquityAndOtherInvestmentsCf	67984
CY2017	rsrv	Income From Equity And Other Investments Cf IncomeFromEquityAndOtherInvestmentsCf	-383024
CY2018	rsrv	Income Tax Reconciliation Deductions Allowable Depletion IncomeTaxReconciliationDeductionsAllowableDepletion	192979
CY2017	rsrv	Income Tax Reconciliation Deductions Allowable Depletion IncomeTaxReconciliationDeductionsAllowableDepletion	51533
CY2018	rsrv	Net Increase Decrease In Sales And Transfer Prices Net Of Production Costs NetIncreaseDecreaseInSalesAndTransferPricesNetOfProductionCosts	2156124
CY2017	rsrv	Net Increase Decrease In Sales And Transfer Prices Net Of Production Costs NetIncreaseDecreaseInSalesAndTransferPricesNetOfProductionCosts	2394155
CY2018Q4	rsrv	Other Property Equipment Net OtherPropertyEquipmentNet	154385
CY2017Q4	rsrv	Other Property Equipment Net OtherPropertyEquipmentNet	151017
CY2018	rsrv	Payment For Production Costs PaymentForProductionCosts	2391711
CY2017	rsrv	Payment For Production Costs PaymentForProductionCosts	2195844
CY2018	rsrv	Payments For Farm Expense PaymentsForFarmExpense	585
CY2017	rsrv	Payments For Farm Expense PaymentsForFarmExpense	569
CY2018	rsrv	Payments For Purchase Of Trading Securities Operating Activities PaymentsForPurchaseOfTradingSecuritiesOperatingActivities	1517352
CY2017	rsrv	Payments For Purchase Of Trading Securities Operating Activities PaymentsForPurchaseOfTradingSecuritiesOperatingActivities	3486002
CY2018	rsrv	Payments To Acquire Available For Sale Debt Securities PaymentsToAcquireAvailableForSaleDebtSecurities	32664425
CY2017	rsrv	Payments To Acquire Available For Sale Debt Securities PaymentsToAcquireAvailableForSaleDebtSecurities	32769546
CY2018	rsrv	Proceeds From Lease Bonuses And Other ProceedsFromLeaseBonusesAndOther	562184
CY2017	rsrv	Proceeds From Lease Bonuses And Other ProceedsFromLeaseBonusesAndOther	184282
CY2018	rsrv	Proceeds From Sale Of Trading Securities Operating Activities ProceedsFromSaleOfTradingSecuritiesOperatingActivities	1514362
CY2017	rsrv	Proceeds From Sale Of Trading Securities Operating Activities ProceedsFromSaleOfTradingSecuritiesOperatingActivities	3483394
CY2018	rsrv	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other1 StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther1	-47659
CY2017	rsrv	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other1 StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther1	17383
CY2018	srt	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	332441
CY2017	srt	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	710294
CY2018Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	28398588
CY2017Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	25418030
CY2018Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	701106
CY2017Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	362534
CY2018Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	11610637
CY2017Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	10183689
CY2018Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	3749911
CY2017Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	3121751
CY2018	srt	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-225892
CY2017	srt	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-517818
CY2018	srt	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace
CY2017	srt	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace
CY2018	srt	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	442030
CY2017	srt	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	929958
CY2018	srt	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	-2430324
CY2017	srt	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	-2343561
CY2018	srt	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-351884
CY2017	srt	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-71628
CY2018	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	923952
CY2017	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	689080
CY2018Q4	srt	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	7860726
CY2017Q4	srt	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	7061938
CY2016Q4	srt	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	5254075
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	318387
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	235007
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	846419
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	829824
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	249333
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	253239
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	65000
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	65000
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	47139
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	46574
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	11386
CY2017	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	31627
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	64129
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	22573
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	5084
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	8329
CY2018Q4	us-gaap	Assets Assets	37968911
CY2017Q4	us-gaap	Assets Assets	36303600
CY2018Q4	us-gaap	Assets Current AssetsCurrent	24212935
CY2017Q4	us-gaap	Assets Current AssetsCurrent	23030944
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax	0
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax	0
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	16249414
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	16371544
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4767810
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8071854
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1660689
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CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	936272
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CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	725317
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2103882
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2133338
CY2018	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	622024
CY2017	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	976731
CY2018	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	1770215
CY2017	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	1274931
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	96443
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10362
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	95659
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	10529
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-784
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.50
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.50
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.50
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	184735
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	184735
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	184735
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	157904
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	157665
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	157233
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	92368
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	92368
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;"><div style="display: inline; text-decoration: underline;">Concentrations of Credit Risk and Major Customers</div></div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;"> </div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;">The Company’s receivables relate primarily to sales of oil and natural gas to purchasers with operations in Texas, Oklahoma, Kansas, and South Dakota. The Company had <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">two</div> purchasers in both <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">2018</div> and <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">2017</div> whose purchases were <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">31%</div> and <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">35%,</div> respectively, of total oil and gas sales.</div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;"> </div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;">The Company maintains its cash in bank deposit accounts, which at times <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;"> may </div>exceed federally insured limits. The Company has <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">not</div> experienced any losses in such accounts, and believes that it is <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">not</div> exposed to any significant credit risk with respect to cash and cash equivalents.</div></div></div>
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2391656
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	2190020
CY2018	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves
CY2017	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves
CY2018	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	485348
CY2017	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	568893
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	167
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	292221
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-593111
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2569838
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2399348
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1359567
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1481298
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	224670
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	266141
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-582582
CY2018	us-gaap	Dividend Income Operating DividendIncomeOperating	2902
CY2017	us-gaap	Dividend Income Operating DividendIncomeOperating	2597
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	788942
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	787493
CY2017Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	1228648
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	14.69
CY2017	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	4.35
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.14
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.05
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	881860
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	991094
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	454058
CY2017Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	559936
CY2018	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-108868
CY2017	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	83622
CY2018	us-gaap	Exploration Costs ExplorationCosts	205671
CY2017	us-gaap	Exploration Costs ExplorationCosts	838145
CY2018	us-gaap	Exploration Expense ExplorationExpense	195111
CY2017	us-gaap	Exploration Expense ExplorationExpense	883593
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	562671
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	9524
CY2018	us-gaap	Gain Loss On Sale Of Oil And Gas Property GainLossOnSaleOfOilAndGasProperty	611281
CY2017	us-gaap	Gain Loss On Sale Of Oil And Gas Property GainLossOnSaleOfOilAndGasProperty	59683
CY2018	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	408
CY2017	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	3540
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1679507
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	1620955
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2701572
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	103105
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-84484
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-61976
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-24750
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-49500
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	387880
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-577797
CY2018	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	305
CY2017	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	618
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	567330
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	35035
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	13050
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	12498
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	784
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-167
CY2018Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	16387
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	326830
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4692
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-13034
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-25057
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	95259
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	292221
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-593111
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-310443
CY2017	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-209968
CY2018	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	33469
CY2017	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	11233
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-12030
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	46228
CY2018	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-75940
CY2017	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-37491
CY2018	us-gaap	Interest Income Other InterestIncomeOther	348615
CY2017	us-gaap	Interest Income Other InterestIncomeOther	130498
CY2018	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	16500
CY2017	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	445000
CY2018Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2571109
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2624394
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	30000
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	30000
CY2018Q4	us-gaap	Liabilities Liabilities	4385498
CY2017Q4	us-gaap	Liabilities Liabilities	4181582
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	37968911
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	36303600
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	343630
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	260250
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	4041868
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	3921332
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1024303
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-873334
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2161108
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5202162
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4846100
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2771452
CY2018	us-gaap	Net Income Loss NetIncomeLoss	2313692
CY2017	us-gaap	Net Income Loss NetIncomeLoss	685687
CY2018Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	218158
CY2017Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	175000
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	46008467
CY2017Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	45335894
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	57038949
CY2017Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	55833139
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	11030482
CY2017Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	10497245
CY2017Q4	us-gaap	Oil And Gas Reclamation Liability Noncurrent OilAndGasReclamationLiabilityNoncurrent	1774634
CY2016Q4	us-gaap	Oil And Gas Reclamation Liability Noncurrent OilAndGasReclamationLiabilityNoncurrent	1710677
CY2018Q4	us-gaap	Oil And Gas Reclamation Liability Noncurrent OilAndGasReclamationLiabilityNoncurrent	1774114
CY2018	us-gaap	Operating Expenses OperatingExpenses	6370156
CY2017	us-gaap	Operating Expenses OperatingExpenses	6827906
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	1957342
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-518316
CY2018	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	562184
CY2017	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	184282
CY2018	us-gaap	Other Expenses OtherExpenses	47724
CY2017	us-gaap	Other Expenses OtherExpenses	47143
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	64804
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	25243
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	25243
CY2018Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	1689249
CY2017Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	1633300
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	828714
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	683397
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	35829
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	959499
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	837505
CY2018	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	43158
CY2017	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	175000
CY2018	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	2788038
CY2017	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	2688759
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	55949
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	6444
CY2018	us-gaap	Payments To Suppliers And Employees PaymentsToSuppliersAndEmployees	1674759
CY2017	us-gaap	Payments To Suppliers And Employees PaymentsToSuppliersAndEmployees	1623453
CY2018	us-gaap	Proceeds From Customers ProceedsFromCustomers	7790371
CY2017	us-gaap	Proceeds From Customers ProceedsFromCustomers	6029703
CY2018	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	2902
CY2017	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	2597
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	16500
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	445000
CY2018	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	214784
CY2017	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	199439
CY2018	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	315146
CY2017	us-gaap	Proceeds From Interest Received ProceedsFromInterestReceived	119265
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	32786554
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	29841639
CY2018	us-gaap	Proceeds From Other Operating Activities ProceedsFromOtherOperatingActivities	6008
CY2017	us-gaap	Proceeds From Other Operating Activities ProceedsFromOtherOperatingActivities	9140
CY2018	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	587408
CY2017	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	150948
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	403718
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	404256
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11184867
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10648262
CY2018Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	54789836
CY2017Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	53536453
CY2018	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	5600
CY2017	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	5600
CY2018	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	2103882
CY2017	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	2133338
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	35023662
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	33497463
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	7765314
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	6125308
CY2018	us-gaap	Revenues Revenues	8327498
CY2017	us-gaap	Revenues Revenues	6309590
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	32261102
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	32122018
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	33583413
CY2018Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	35181030
CY2017Q4	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	33654831
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	33583413
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	32122018
CY2018	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	72950
CY2017	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	34884
CY2018	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	-181818
CY2017	us-gaap	Trading Securities Unrealized Holding Gain Loss TradingSecuritiesUnrealizedHoldingGainLoss	48738
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	26831
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	27070
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	27502
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	239
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	432
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1597617
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1532813
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	35829
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	64804
CY2018Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	2249113
CY2017Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	2296686
CY2018	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-181818
CY2017	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	48738
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;"><div style="display: inline; text-decoration: underline;">Use of Estimates</div></div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;"> </div> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin-bottom:0pt;margin-left:27pt;margin-right:1.8pt;margin-top:0pt;text-align:justify;">The preparation of the financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates include oil and natural gas reserve quantities that form the basis for the calculation of amortization of oil and natural gas properties. Management emphasizes that reserve estimates are inherently imprecise and that estimates of more recent reserve discoveries are more imprecise than those for properties with long production histories. Actual results could differ from the estimates and assumptions used in the preparation of the Company’s financial statements.</div></div></div>
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	0
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	0
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	157458
CY2017	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	157788

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rsrv-20181231.xml	Edgar Link	completed
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$RSRV
RESERVE PETROLEUM CO Stock $rsrv

2018 Form 10-K Financial Statement

#000143774919005801 Filed on March 27, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RSRV RESERVE PETROLEUM CO Stock $rsrv

2018 Form 10-K Financial Statement

#000143774919005801 Filed on March 27, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RSRV
RESERVE PETROLEUM CO Stock $rsrv