Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.1.9
Commitments and Contingencies - Additional Information (Detail) (USD $)
 3 Months Ended 0 Months Ended 1 Months Ended
Mar. 31, 2015
acre
Nov. 01, 2015
Jan. 31, 2015
acre
Loss Contingencies [Line Items]      
Expended or accrued for capital improvements $ 562,500us-gaap_PaymentsForCapitalImprovements    
Additional costs expected for capital improvements 188,000us-gaap_PaymentsForLeasingCostsCommissionsAndTenantImprovements    
Farm Acres 7,185land_FarmableAreaOfLand    
Initial payment made for acquisition of real estate property 19,869,405us-gaap_PaymentsToAcquireRealEstate    
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 		   
Wauchula Road [Member]      
Loss Contingencies [Line Items]      
Farm Acres 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 		   
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 		   
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. These improvements are expected to be completed during the three months ending September 30, 2015. As of March 31, 2015, we have expended or accrued $562,500 related to these improvements, and we expect to incur additional costs of approximately $188,000. 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 		 
Espinosa Road [Member]      
Loss Contingencies [Line Items]      
Area of nonfarmable land     4.5land_NonfarmableAreaOfLand
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
Fair compensation amount for nonfarmable land     160,000land_AcquisitionOfRealEstatePropertyFairCompensationAmountForNonfarmableLand
/ us-gaap_RealEstatePropertiesAxis
= land_EspinosaRoadMember
Parrish Road [Member]      
Loss Contingencies [Line Items]      
Initial payment made for acquisition of real estate property 3,200,000us-gaap_PaymentsToAcquireRealEstate
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember 		   
Additional compensation committed upon approval of increase in water permits 700,000land_AcquisitionOfRealEstatePropertyAdditionalCompensationCommittedUponApprovalOfIncreaseInWaterPermits
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember 		   
additional compensation committed upon irrigation improvements and upgrades $ 500,000land_AcquisitionOfRealEstatePropertyAdditionalCompensationCommittedUponIrrigationImprovementsAndUpgrades
/ us-gaap_RealEstatePropertiesAxis
= land_ParrishRoadMember