Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Additional Information (Detail)

v2.4.1.9
Real Estate and Intangible Assets - Additional Information (Detail) (USD $)
 0 Months Ended 3 Months Ended 0 Months Ended
Mar. 31, 2015
Farm
acre
Mar. 31, 2015
Farm
acre
Mar. 31, 2014
Farm
acre
Feb. 23, 2015
Renewal_Options
Feb. 09, 2015
Nov. 01, 2015
Real Estate Properties [Line Items]            
Number of Farms 34land_NumberOfRealEstateFarms 34land_NumberOfRealEstateFarms 21land_NumberOfRealEstateFarms      
Number of farms acquired in separate transaction   2land_NumberOfFarmsAcquiredNotCoveredUnderBusinessCombination        
Number of farms acquired   2land_NumberOfFarmsAcquired        
Rental income   $ 2,622,327us-gaap_OperatingLeasesIncomeStatementLeaseRevenue $ 1,495,636us-gaap_OperatingLeasesIncomeStatementLeaseRevenue      
Aggregate annual real estate property taxes 1,075,000us-gaap_RealEstateTaxExpense          
Payables for real estate property taxes 518,000us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent 518,000us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent        
Area leased 8,789us-gaap_AreaOfRealEstateProperty 8,789us-gaap_AreaOfRealEstateProperty 6,000us-gaap_AreaOfRealEstateProperty      
Area leased, percentage   100.00%land_PercentageOfAreaOfLand 100.00%land_PercentageOfAreaOfLand      
Percent of total rental revenue   100.00%land_PercentageOfRentalRevenue 100.00%land_PercentageOfRentalRevenue      
Scenario, Forecast [Member]            
Real Estate Properties [Line Items]            
Payables for real estate property taxes           171,000us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrentAndNoncurrent
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
California [Member]            
Real Estate Properties [Line Items]            
Number of Farms 15land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		15land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		8land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		     
Rental income   1,839,707us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		1,013,612us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		     
Area leased 2,722us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		2,722us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		1,454us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		     
Area leased, percentage 31.00%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		31.00%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		24.20%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		     
Percent of total rental revenue   70.20%land_PercentageOfRentalRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		67.80%land_PercentageOfRentalRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		     
Oregon [Member]            
Real Estate Properties [Line Items]            
Number of Farms   4land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		2land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		     
Rental income   291,537us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		238,025us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		     
Area leased 2,313us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		2,313us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		2,113us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		     
Area leased, percentage   26.30%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		35.20%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		     
Percent of total rental revenue   11.10%land_PercentageOfRentalRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		15.90%land_PercentageOfRentalRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_OR 		     
Florida [Member]            
Real Estate Properties [Line Items]            
Number of Farms   10land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		6land_NumberOfRealEstateFarms
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		     
Rental income   349,488us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		116,982us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		     
Area leased 1,723us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		1,723us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		402us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		     
Area leased, percentage   19.60%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		6.70%land_PercentageOfAreaOfLand
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		     
Percent of total rental revenue   13.30%land_PercentageOfRentalRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		7.80%land_PercentageOfRentalRevenue
/ us-gaap_StatementGeographicalAxis
= stpr_FL 		     
Maximum [Member] | Geographic Concentration Risk [Member] | Rental Income [Member] | California [Member]            
Real Estate Properties [Line Items]            
Percentage of individual tenant represented total rental revenue recorded   10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= land_RentalIncomeMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= land_RentalIncomeMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementGeographicalAxis
= stpr_CA 		     
Dole Food Company [Member]            
Real Estate Properties [Line Items]            
Rental income   700,000us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		       
Total number of lease agreement with single tenant 2land_NumberOfLeaseWithSingleTenant
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		         
Area leased 960us-gaap_AreaOfRealEstateProperty
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		960us-gaap_AreaOfRealEstateProperty
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		       
Area leased, percentage 10.90%land_PercentageOfAreaOfLand
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		         
Percent of total rental revenue   28.10%land_PercentageOfRentalRevenue
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		47.20%land_PercentageOfRentalRevenue
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember 		     
Dole Food Company [Member] | Maximum [Member] | Customer Concentration Risk [Member] | Rental Income [Member]            
Real Estate Properties [Line Items]            
Percentage of individual tenant represented total rental revenue recorded   10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= land_RentalIncomeMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= land_RentalIncomeMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_CounterpartyNameAxis
= land_DoleFoodCompanyMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember 		     
Separate Tenant [Member]            
Real Estate Properties [Line Items]            
Percent of total rental revenue   11.70%land_PercentageOfRentalRevenue
/ us-gaap_CounterpartyNameAxis
= land_SeparateTenantsMember 		12.70%land_PercentageOfRentalRevenue
/ us-gaap_CounterpartyNameAxis
= land_SeparateTenantsMember 		     
Spring Valley [Member]            
Real Estate Properties [Line Items]            
Maturity date of lease       Sep. 30, 2022    
Rental income       327,904us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember 		   
Percentage increase in lease amount       32.50%land_PercentageIncrementInLeasePayments
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember 		   
Lease renewal term       6 years    
Number of options granted to extend the lease       2land_OperatingLeasesNumberOfOptionsToExtendLease
/ us-gaap_RealEstatePropertiesAxis
= land_SpringValleyMember 		   
Additional extension period of under the option of tenant       6 years    
Keysville Road [Member]            
Real Estate Properties [Line Items]            
Maturity date of lease         Jun. 30, 2020  
Rental income         73,749us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
/ us-gaap_RealEstatePropertiesAxis
= land_KeysvilleRoadMember 		 
Percentage increase in lease amount         7.90%land_PercentageIncrementInLeasePayments
/ us-gaap_RealEstatePropertiesAxis
= land_KeysvilleRoadMember 		 
Write-off of deferred rent asset balances and rental income related to terminated lease   $ 32,497land_DeferredRentAssetBalanceAndRentalIncomeWrittenOffOnLeaseTermination
/ us-gaap_RealEstatePropertiesAxis
= land_KeysvilleRoadMember