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Statements of Cash Flows (Unaudited) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cash Flows From Operating Activities:    
Net Income $ 89,014us-gaap_NetIncomeLoss $ 321,159us-gaap_NetIncomeLoss
Less non-operating activities:    
Gain on sale of land (1,498)us-gaap_GainLossOnSaleOfProperties  
Less non-cash (income) expenses included in net income:    
Depreciation and depletion   1,671us-gaap_DepreciationDepletionAndAmortization
Change in operating assets and liabilities:    
Increase in current assets (18,545)us-gaap_IncreaseDecreaseInOperatingAssets (23,414)us-gaap_IncreaseDecreaseInOperatingAssets
Increase in current liabilities 46,948us-gaap_IncreaseDecreaseInOperatingLiabilities 84,451us-gaap_IncreaseDecreaseInOperatingLiabilities
Net cash provided from operating activities 115,919us-gaap_NetCashProvidedByUsedInOperatingActivities 383,867us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash Flows From Investing Activities:    
Purchases (240,000)us-gaap_PaymentsForProceedsFromOtherInvestingActivities  
Maturity proceeds 720,000us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities 516,000us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Proceeds from sale of land 1,666us-gaap_ProceedsFromSaleOfLandHeldforinvestment  
Purchases and reforestation (17,729)us-gaap_PaymentsForCapitalImprovements (5,764)us-gaap_PaymentsForCapitalImprovements
Net cash provided from (used in) investing activities 463,937us-gaap_NetCashProvidedByUsedInInvestingActivities 510,236us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash Flows From Financing Activities:    
Dividends paid 0us-gaap_PaymentsOfDividendsCommonStock 0us-gaap_PaymentsOfDividendsCommonStock
Net cash used in financing activities 0us-gaap_NetCashProvidedByUsedInFinancingActivities 0us-gaap_NetCashProvidedByUsedInFinancingActivities
Net increase (decrease) in cash and cash equivalents 579,856us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 894,103us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents:    
Beginning 5,225,594us-gaap_CashAndCashEquivalentsAtCarryingValue 4,529,051us-gaap_CashAndCashEquivalentsAtCarryingValue
Ending 5,805,450us-gaap_CashAndCashEquivalentsAtCarryingValue 5,423,154us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosures of cash flow information:    
Interest 0us-gaap_InterestPaid 0us-gaap_InterestPaid
Income taxes   68,000us-gaap_IncomeTaxesPaid
Supplemental schedule of non-cash investing and financing activities:    
Net change in recognized and unrecognized unrealized gains (losses) on available-for-sale securities $ 0us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1 $ 0us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationGiven1