XML 35 R36.htm IDEA: XBRL DOCUMENT
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Mortgage Notes Payable (Details) (USD $) | 12 Months Ended | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Nov. 30, 2014 | May 31, 2014 | Aug. 31, 2014
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | $ 123,899,298 us-gaap_NotesPayable |  | $ 123,899,298 us-gaap_NotesPayable |  | $ 89,551,724 us-gaap_NotesPayable |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 123,899,298 us-gaap_NotesPayable |  | 123,899,298 us-gaap_NotesPayable |  | 89,551,724 us-gaap_NotesPayable |  |  |
Havana/Parker Complex [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 2,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 3,098,780 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  |
Maturity date | Jul. 01, 2016 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 6.51%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember | [1] | 6.51%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 2,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 3,098,780 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  |
Debt Instrument, Maturity Date | Jul. 01, 2016 |  |  |  |  |  |  |
Havana/Parker Complex [Member] | Modification Agreement [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,500,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 2,500,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  | 3,037,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |
Maturity date |  |  | Jul. 01, 2016 |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 2.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 2.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,500,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  | 2,500,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  | 3,037,000 us-gaap_NotesPayable / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |
Debt Instrument Decrease Forgiveness |  |  | 537,000 us-gaap_DebtInstrumentDecreaseForgiveness / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  |  |  |
Debt Instrument Periodic Payment Principal |  |  | 100,000 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_DebtInstrumentAxis = netr_ModificationAgreementMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_HavanaParkerMember |  |  |  |  |
Debt Instrument, Maturity Date |  |  | Jul. 01, 2016 |  |  |  |  |
Garden Gateway Plaza [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 6,963,381 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember |  | 6,963,381 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember |  | 7,119,544 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember |  |  |
Maturity date | Apr. 05, 2020 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember | [1] | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 6,963,381 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember |  | 6,963,381 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember |  | 7,119,544 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GardenGatewayPlazaMember |  |  |
Debt Instrument, Maturity Date | Apr. 05, 2020 |  |  |  |  |  |  |
Waterman Plaza [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 3,368,146 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember |  | 3,368,146 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember |  | 3,457,973 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember |  |  |
Maturity date | Sep. 01, 2015 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember | [1] | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 3,368,146 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember |  | 3,368,146 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember |  | 3,457,973 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_WatermanPlazaMember |  |  |
Debt Instrument, Maturity Date | Sep. 01, 2015 |  |  |  |  |  |  |
Sparky's Thousand Palms Self-Storage [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 4,092,100 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember |  | 4,092,100 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember |  | 4,215,349 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember |  |  |
Maturity date | Mar. 01, 2034 |  |  |  |  |  |  |
Interest rate, Current | 5.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember | [1],[2] | 5.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember | [1],[2] |  |  |  |
Interest rate, minimum (in hundredths) | 5.50%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember | [3] |  |  |  |  |  |
Interest rate, maximum (in hundredths) | 10.50%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember | [3] |  |  |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 4,092,100 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember |  | 4,092,100 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember |  | 4,215,349 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThousandPalmsSelfStorageMember |  |  |
Debt Instrument, Maturity Date | Mar. 01, 2034 |  |  |  |  |  |  |
Sparky's Hesperia East Self-Storage [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 830,883 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember |  | 830,883 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember |  | 890,774 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember |  |  |
Maturity date | Dec. 18, 2022 |  |  |  |  |  |  |
Interest rate, Current | 4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember | [1],[2] | 4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember | [1],[2] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 830,883 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember |  | 830,883 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember |  | 890,774 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysHesperiaEastSelfStorageMember |  |  |
Debt Instrument, Maturity Date | Dec. 18, 2022 |  |  |  |  |  |  |
Sparky's Rialto Self-Storage [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,119,037 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember |  | 2,119,037 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember |  | 2,166,791 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember |  |  |
Periodic payment | 11,982 us-gaap_DebtInstrumentPeriodicPayment / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember | [4] |  |  |  |  |  |
Maturity date | May 03, 2018 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember | [1],[4] | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember | [1],[4] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,119,037 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember |  | 2,119,037 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember |  | 2,166,791 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysRialtoSelfStorageMember |  |  |
Debt Instrument, Maturity Date | May 03, 2018 |  |  |  |  |  |  |
Genesis Plaza [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 4,491,588 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember |  | 4,491,588 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember |  | 4,618,147 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember |  |  |
Maturity date | Sep. 01, 2015 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember | [1] | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 4,491,588 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember |  | 4,491,588 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember |  | 4,618,147 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_GenesisPlazaMember |  |  |
Debt Instrument, Maturity Date | Sep. 01, 2015 |  |  |  |  |  |  |
Executive Office Park [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 4,379,854 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember |  | 4,379,854 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember |  | 4,447,699 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember |  |  |
Maturity date | Jul. 01, 2025 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 5.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember | [1],[5] | 5.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember | [1],[5] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 4,379,854 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember |  | 4,379,854 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember |  | 4,447,699 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ExecutiveOfficeParkMember |  |  |
Debt Instrument, Maturity Date | Jul. 01, 2025 |  |  |  |  |  |  |
Dakota Bank Buildings [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 10,993,386 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember |  | 10,993,386 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember |  | 5,417,950 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember |  |  |
Maturity date | Jul. 06, 2024 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.74%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember | [1] | 4.74%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 10,993,386 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember |  | 10,993,386 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember |  | 5,417,950 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_DakotaBankBuildingsMember |  |  |
Debt Instrument, Maturity Date | Jul. 06, 2024 |  |  |  |  |  |  |
Yucca Valley Retail Center [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,982,411 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember |  | 2,982,411 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember |  | 3,095,974 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember |  |  |
Maturity date | Apr. 11, 2015 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 5.62%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember | [1] | 5.62%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,982,411 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember |  | 2,982,411 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember |  | 3,095,974 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_YuccaValleyRetailCenterMember |  |  |
Debt Instrument, Maturity Date | Apr. 11, 2015 |  |  |  |  |  |  |
Rangewood Medical Office Building [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,092,778 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember |  | 1,092,778 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember |  | 1,155,305 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember |  |  |
Maturity date | Jan. 01, 2019 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember | [1] | 4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,092,778 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember |  | 1,092,778 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember |  | 1,155,305 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RangewoodMedicalOfficeBuildingMember |  |  |
Debt Instrument, Maturity Date | Jan. 01, 2019 |  |  |  |  |  |  |
Regatta Square [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,214,799 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember |  | 1,214,799 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember |  | 1,244,615 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember |  |  |
Maturity date | Jan. 01, 2019 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember | [1] | 4.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,214,799 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember |  | 1,214,799 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember |  | 1,244,615 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_RegattaSquareMember |  |  |
Debt Instrument, Maturity Date | Jan. 01, 2019 |  |  |  |  |  |  |
Port of San Diego Complex [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 10,368,228 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember |  | 10,368,228 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember |  | 10,608,385 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember |  |  |
Maturity date | Mar. 05, 2020 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember | [1] | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 10,368,228 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember |  | 10,368,228 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember |  | 10,608,385 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PortOfSanDiegoComplexMember |  |  |
Debt Instrument, Maturity Date | Mar. 05, 2020 |  |  |  |  |  |  |
Morena Office Center [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,351,805 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember |  | 2,351,805 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember |  | 2,411,282 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember |  |  |
Maturity date | Jan. 01, 2021 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember | [1],[6] | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember | [1],[6] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 2,351,805 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember |  | 2,351,805 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember |  | 2,411,282 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_MorenaOfficeCenterMember |  |  |
Debt Instrument, Maturity Date | Jan. 01, 2021 |  |  |  |  |  |  |
Pacific Oaks Plaza [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,599,204 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember |  | 1,599,204 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember |  | 1,639,658 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember |  |  |
Maturity date | Jun. 01, 2021 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember | [1],[6] | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember | [1],[6] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,599,204 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember |  | 1,599,204 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember |  | 1,639,658 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PacificOaksPlazaMember |  |  |
Debt Instrument, Maturity Date | Jun. 01, 2021 |  |  |  |  |  |  |
Shoreline Medical Building [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 3,846,697 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember |  | 3,846,697 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember |  | 3,959,914 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember |  |  |
Maturity date | Jun. 01, 2022 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 5.10%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember | [1],[6] | 5.10%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember | [1],[6] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 3,846,697 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember |  | 3,846,697 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember |  | 3,959,914 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ShorelineMedicalBuildingMember |  |  |
Debt Instrument, Maturity Date | Jun. 01, 2022 |  |  |  |  |  |  |
Sparky's Three Properties [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 7,986,522 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember |  | 7,986,522 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember |  | 8,116,028 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember |  |  |
Maturity date | Dec. 06, 2022 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.70%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember | [1] | 4.70%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 7,986,522 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember |  | 7,986,522 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember |  | 8,116,028 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysThreePropertiesMember |  |  |
Debt Instrument, Maturity Date | Dec. 06, 2022 |  |  |  |  |  |  |
The Presidio [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 6,000,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember |  | 6,000,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember |  | 5,492,375 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember |  |  |
Maturity date | Dec. 01, 2024 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.54%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember | [1] | 4.54%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 6,000,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember |  | 6,000,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember |  | 5,492,375 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_PresidioMember |  |  |
Debt Instrument, Maturity Date | Dec. 01, 2024 |  |  |  |  |  |  |
Sparkys Lancaster Self Storage [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,903,982 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember |  | 1,903,982 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember |  | 1,965,504 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember |  |  |
Maturity date | Jun. 01, 2020 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember | [1] | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 1,903,982 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember |  | 1,903,982 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember |  | 1,965,504 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_SparkysLancasterSelfStorageMember |  |  |
Debt Instrument, Maturity Date | Jun. 01, 2020 |  |  |  |  |  |  |
Fontana Medical Plaza [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember |  | 1,990,880 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember |  |  |
Maturity date | Aug. 28, 2019 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember | [1] | 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember |  | 1,990,880 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_FontanaMedicalPlazaMember |  |  |
Debt Instrument, Maturity Date | Aug. 28, 2019 |  |  |  |  |  |  |
Bismarck Office [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 3,321,198 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |  | 3,321,198 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |  | 3,400,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |
Maturity date | Oct. 01, 2016 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 6.12%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember | [1] | 6.12%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 3,321,198 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |  | 3,321,198 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |  | 3,400,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_BismarckOfficeMember |
Debt Instrument, Maturity Date | Oct. 01, 2016 |  |  |  |  |  |  |
Union Terrace [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 6,600,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember |  | 6,600,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember |  |  | 6,600,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember
Maturity date | Sep. 05, 2024 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember | [1] | 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 6,600,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember |  | 6,600,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember |  |  | 6,600,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTerraceMember
Debt Instrument, Maturity Date | Sep. 05, 2024 |  |  |  |  |  |  |
Centennial Tech Center [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 10,250,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember |  | 10,250,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember |  |  |
Maturity date | Dec. 05, 2024 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember | [1] | 4.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 10,250,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember |  | 10,250,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_CentennialTechCenterMember |  |  |
Debt Instrument, Maturity Date | Dec. 05, 2024 |  |  |  |  |  |  |
Arapahoe Service Center [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 8,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember |  | 8,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember |  |  |
Maturity date | Jan. 05, 2025 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember | [1] | 4.34%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 8,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember |  | 8,500,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ArapahoeServiceCenterMember |  |  |
Debt Instrument, Maturity Date | Jan. 05, 2025 |  |  |  |  |  |  |
Union Town Center [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 8,440,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember |  | 8,440,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember |  |  |
Maturity date | Jan. 05, 2025 |  |  |  |  |  |  |
Fixed interest rate on mortgage (in hundredths) | 4.28%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember | [1] | 4.28%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember | [1] |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 8,440,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember |  | 8,440,000 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember |  | 0 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_UnionTownCenterMember |  |  |
Debt Instrument, Maturity Date | Jan. 05, 2025 |  |  |  |  |  |  |
NetREIT Inc Properties [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 116,195,999 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_NetreitIncPropertiesMember |  | 116,195,999 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_NetreitIncPropertiesMember |  | 77,112,927 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_NetreitIncPropertiesMember |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | 116,195,999 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_NetreitIncPropertiesMember |  | 116,195,999 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_NetreitIncPropertiesMember |  | 77,112,927 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_NetreitIncPropertiesMember |  |  |
Model Home Properties [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | 7,703,299 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember |  | 7,703,299 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember |  | 12,438,797 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember |  |  |
Fixed interest rate on mortgage range, minimum (in hundredths) | 4.90%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember | [7] |  |  |  |  |  |
Fixed interest rate on mortgage range, maximum (in hundredths) | 5.80%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember | [7] |  |  |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Mortgage notes payable | $ 7,703,299 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember |  | $ 7,703,299 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember |  | $ 12,438,797 us-gaap_NotesPayable / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = netr_ModelHomePropertiesMember |  |  |
Model Home Properties [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maturity date | Jan. 01, 2015 |  |  |  |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date | Jan. 01, 2015 |  |  |  |  |  |  |
Model Home Properties [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maturity date | Jan. 01, 2019 |  |  |  |  |  |  |
Mortgage Notes Narrative [Abstract] |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date | Jan. 01, 2019 |  |  |  |  |  |  |
[1] | Interest rates as of December 31, 2014
[2] | Interest at a variable rate indexed to the 5 year interest rate swap .
[3] | Interest at variable rate ranging from 5.50%-10.50%.
[4] | Interest subject to reset; thereafter, monthly payments of $11,982, including interest at rate indexed to 5-year Treasury Rate + 3%
[5] | Interest rate is subject to reset on July 1, 2018.
[6] | Interest rate subject to resetting on the 3rd and 6th loan anniversary.
[7] | Each Model Home has a standalone mortgage note at interest rates ranging from 4.9% to 5.8% (at December 31, 2014).

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