Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.1.9
Commitments and Contingencies - Additional Information (Detail) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
acre
Nov. 01, 2015
Dec. 31, 2014
Jan. 31, 2014
Loss Contingencies [Line Items]        
Area for installation of irrigation equipment 121land_InitialFarmableAreaUnderLease      
Total farmable area of Colding loop property 181us-gaap_LandSubjectToGroundLeases   181us-gaap_LandSubjectToGroundLeases  
Expended irrigation costs       $ 616,071land_ExpendedCostOfWellAndIrrigationEquipment
Additional leased farm land 60land_AdditionalFarmableAreaUnderLease      
Additional estimated irrigation costs 83,000land_ContingentEstimatedCostOfWellAndIrrigationEquipment   83,000land_ContingentEstimatedCostOfWellAndIrrigationEquipment  
Additional water permit for property, escrow amount 129,700us-gaap_EscrowDepositDisbursementsRelatedToPropertyAcquisition1      
Farm Acres 6,637land_FarmableAreaOfLand   6,637land_FarmableAreaOfLand  
Water Permit [Member]        
Loss Contingencies [Line Items]        
Date of plan approval for new water permit Jan. 27, 2015      
Date of funds released for new water permit Feb. 12, 2015      
West Gonzales [Member]        
Loss Contingencies [Line Items]        
Total cost of upgrading cooling facility 175,956land_EstimatedCoolingFacilityUpgradeCost
/ us-gaap_RealEstatePropertiesAxis
= land_WestGonzalesMember 		     
Cost of upgrading cooling facility reimbursed through insurance proceeds 113,371land_EstimatedCoolingFacilityUpgradeCostRecoveredFromInsurance
/ us-gaap_RealEstatePropertiesAxis
= land_WestGonzalesMember 		     
West Gonzales [Member] | Fire [Member]        
Loss Contingencies [Line Items]        
Cash paid for repairs, reimbursed through insurance proceeds 320,828land_CashPaidForRepairsProceedFromInsuranceSettlements
/ us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis
= us-gaap_FireMember
/ us-gaap_RealEstatePropertiesAxis
= land_WestGonzalesMember 		     
Additional payment of remaining repairs 35,648land_AdditionalPaymentForRepairsProceedFromInsuranceSettlements
/ us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis
= us-gaap_FireMember
/ us-gaap_RealEstatePropertiesAxis
= land_WestGonzalesMember 		     
Sycamore Road [Member]        
Loss Contingencies [Line Items]        
Lease, acquisition, irrigation improvements, description In connection with the follow-on lease we executed upon our acquisition of Sycamore Road in July 2014, we are required to make certain irrigation improvements on the property to increase overall water availability by November 1, 2015. Work on these improvements will begin in early 2015, and we expect the total cost to be $750,000 or less. In addition, we will earn additional rent on the total cost of these improvements, up to a total cost of $750,000, commensurate with the annual yields on the farmland.      
Sycamore Road [Member] | Scenario, Forecast [Member] | Maximum [Member]        
Loss Contingencies [Line Items]        
Expected cost of irrigation improvements to increase overall water availability   750,000land_ExpectedCostForIrrigationImprovementsOnPropertyToIncreaseWaterAvailability
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RealEstatePropertiesAxis
= land_SycamoreRoadMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember 		   
Wauchula Road [Member]        
Loss Contingencies [Line Items]        
Farm Acres 590land_FarmableAreaOfLand
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember 		  590land_FarmableAreaOfLand
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember 		 
Wauchula Road [Member] | Drip Irrigation [Member]        
Loss Contingencies [Line Items]        
Farm Acres 125land_FarmableAreaOfLand
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember 		  125land_FarmableAreaOfLand
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember 		 
Wauchula Road [Member] | Drip Irrigation [Member] | Maximum [Member]        
Loss Contingencies [Line Items]        
Aggregate cost of improvements 1,500,000us-gaap_ProfessionalAndContractServicesExpense
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RealEstatePropertiesAxis
= land_WauchulaRoadMember 		     
West Beach [Member]        
Loss Contingencies [Line Items]        
Expended or accrued for capital improvements     650,862us-gaap_PaymentsForCapitalImprovements
/ us-gaap_RealEstatePropertiesAxis
= land_WestBeachMember 		 
Additional costs expected for capital improvements     104,000us-gaap_PaymentsForLeasingCostsCommissionsAndTenantImprovements
/ us-gaap_RealEstatePropertiesAxis
= land_WestBeachMember 		 
West Beach [Member] | Minimum [Member]        
Loss Contingencies [Line Items]        
Amount payable to tenant under agreement in two installments $ 46,000land_AmountPayableToTenantUnderLeaseAgreement
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RealEstatePropertiesAxis
= land_WestBeachMember 		  $ 46,000land_AmountPayableToTenantUnderLeaseAgreement
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RealEstatePropertiesAxis
= land_WestBeachMember