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v2.4.1.9

Segments (Net Operating Income by Segment) (Details) (USD $) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Net Operating Income [Abstract] |  |
Rental income | $ 5,382,600 us-gaap_Revenues | $ 3,919,253 us-gaap_Revenues
Property and related expenses | (1,939,589)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment | (1,260,562)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment
General and administrative expenses | (1,154,802)us-gaap_GeneralAndAdministrativeExpense | (1,124,856)us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization | (1,861,546)us-gaap_DepreciationDepletionAndAmortization | (1,178,487)us-gaap_DepreciationDepletionAndAmortization
Interest expense - mortgage notes | (1,432,163)us-gaap_InterestExpenseDebt | (1,049,082)us-gaap_InterestExpenseDebt
Interest and other income | 14,604 us-gaap_InterestIncomeOperating | 18,369 us-gaap_InterestIncomeOperating
Gain on sales of real estate and partnerships, net | 78,496 us-gaap_GainLossOnSaleOfBusiness | 727,776 us-gaap_GainLossOnSaleOfBusiness
Net income (loss) | (1,829,525)us-gaap_ProfitLoss | 118,093 us-gaap_ProfitLoss
Significant Reconciling Items [Member] |  |
Net Operating Income [Abstract] |  |
Net operating income, as defined | 3,473,314 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | 2,724,383 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
General and administrative expenses | (1,154,802)us-gaap_GeneralAndAdministrativeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (1,124,856)us-gaap_GeneralAndAdministrativeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Depreciation and amortization | (1,861,546)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (1,345,756)us-gaap_DepreciationDepletionAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Interest expense - mortgage notes | (2,379,592)us-gaap_InterestExpenseDebt / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (1,049,082)us-gaap_InterestExpenseDebt / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Interest and other income | 14,604 us-gaap_InterestIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | 18,369 us-gaap_InterestIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Gain on sales of real estate and partnerships, net | 78,496 us-gaap_GainLossOnSaleOfBusiness / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | 727,776 us-gaap_GainLossOnSaleOfBusiness / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Net income (loss) | (1,829,526)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (49,166)us-gaap_ProfitLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Industrial Office Properties [Member] | Significant Reconciling Items [Member] |  |
Net Operating Income [Abstract] |  |
Rental income | 4,008,818 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_IndustrialOfficePropertiesMember | 2,607,246 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_IndustrialOfficePropertiesMember
Property and related expenses | (1,580,965)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_IndustrialOfficePropertiesMember | (1,039,090)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_IndustrialOfficePropertiesMember
Net operating income, as defined | 2,427,853 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_IndustrialOfficePropertiesMember | 1,568,156 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_IndustrialOfficePropertiesMember
Residential Properties [Member] | Significant Reconciling Items [Member] |  |
Net Operating Income [Abstract] |  |
Rental income | 357,903 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialRealEstateMember | 671,186 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialRealEstateMember
Property and related expenses | (11,238)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialRealEstateMember | (6,735)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialRealEstateMember
Net operating income, as defined | 346,665 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialRealEstateMember | 664,451 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_ResidentialRealEstateMember
Retail Properties [Member] | Significant Reconciling Items [Member] |  |
Net Operating Income [Abstract] |  |
Rental income | 1,015,878 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RetailSiteMember | 640,826 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RetailSiteMember
Property and related expenses | (347,385)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RetailSiteMember | (214,732)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RetailSiteMember
Net operating income, as defined | 668,493 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RetailSiteMember | 426,094 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_RetailSiteMember
Self Storage Properties [Member] | Significant Reconciling Items [Member] |  |
Net Operating Income [Abstract] |  |
Rental income | 892,977 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_SelfStoragePropertiesMember | 860,587 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_SelfStoragePropertiesMember
Property and related expenses | (862,674)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_SelfStoragePropertiesMember | (794,905)us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_SelfStoragePropertiesMember
Net operating income, as defined | $ 30,303 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_SelfStoragePropertiesMember | $ 65,682 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember / us-gaap_StatementBusinessSegmentsAxis = netr_SelfStoragePropertiesMember

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