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Consolidated Statements of Stockholders' Equity (USD $) | Total | NTR, Inc [Member] | Dubose Model Homes USA [Member] | Redeemable Convertible Series 63 Preferred Stock [Member] | Common Stock [Member] | Common Stock [Member] NTR, Inc [Member] | Common Stock [Member] Dubose Model Homes USA [Member] | Additional Paid In Capital [Member] | Additional Paid In Capital [Member] NTR, Inc [Member] | Additional Paid In Capital [Member] Dubose Model Homes USA [Member] | Accumulated Distributions in Excess of Net Income [Member] | Noncontrolling Interest [Member] | Parent [Member] | Parent [Member] NTR, Inc [Member] | Parent [Member] Dubose Model Homes USA [Member]
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Beginning balance at Dec. 31, 2012 | $ 76,704,545 us-gaap_StockholdersEquity |  |  | $ 16 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember | $ 157,674 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | $ 134,884,312 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | $ (58,337,457)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember | $ 10,678,123 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 87,382,668 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Beginning balance (in shares) at Dec. 31, 2012 |  |  |  | 1,649 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember | 15,767,417 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Net (loss) income | (4,089,094)us-gaap_IncomeLossFromContinuingOperations |  |  |  |  |  |  |  |  |  | (4,089,094)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember | 1,566,023 us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (2,253,071)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Issuance of vested restricted stock (in shares) |  |  |  |  | 56,038 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Issuance of vested restricted stock | 481,930 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross |  |  |  | 560 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 481,370 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | 481,930 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Stock issued for acquisition (in shares) |  |  |  |  |  | 200,000 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_NtrIncMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 38,752 us-gaap_StockIssuedDuringPeriodSharesAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_DuboseModelHomesUsaMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |
Stock issued for acquisition |  | 1,900,000 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_NtrIncMember | 333,269 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_DuboseModelHomesUsaMember |  |  | 2,000 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_NtrIncMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 388 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_DuboseModelHomesUsaMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 1,898,000 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_NtrIncMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 332,881 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_DuboseModelHomesUsaMember / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 1,900,000 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_NtrIncMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 333,269 us-gaap_StockIssuedDuringPeriodValueAcquisitions / us-gaap_BusinessAcquisitionAxis = netr_DuboseModelHomesUsaMember / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember
Common stock repurchased (in shares) |  |  |  |  | (4,882)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Common stock repurchased | (34,172)us-gaap_StockRepurchasedDuringPeriodValue |  |  |  | (48)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | (34,124)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | (34,172)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Dividends paid/reinvested (in shares) |  |  |  |  | 313,017 us-gaap_CommonStockDividendsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Dividends paid/reinvested | (3,623,361)netr_DividendsCashPaidAndReinvested |  |  |  | 3,130 netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 2,951,827 netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (6,578,318)netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember |  | (3,623,361)netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Dividends declared/reinvested ( in shares) |  |  |  |  | 103,332 netr_DividendDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Dividends declared/reinvested | (1,240,455)netr_DividendsCashDeclaredAndReinvested |  |  |  | 1,033 netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 980,617 netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (2,222,105)netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember |  | (1,240,455)netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Contributions from noncontrolling interests net of distributions paid |  |  |  |  |  |  |  |  |  |  |  | 3,191,275 netr_ContributedCapitalLessDistributionsOfNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 3,191,275 netr_ContributedCapitalLessDistributionsOfNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Ending balance at Dec. 31, 2013 | 70,432,662 us-gaap_StockholdersEquity |  |  | 16 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember | 164,737 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 141,494,883 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (71,226,974)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember | 15,435,421 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 85,868,083 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Ending balance (in shares) at Dec. 31, 2013 |  |  |  | 1,649 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember | 16,473,674 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Net (loss) income | (4,045,683)us-gaap_IncomeLossFromContinuingOperations |  |  |  |  |  |  |  |  |  | (4,045,683)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember | 3,192,082 us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (853,601)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Issuance of vested restricted stock (in shares) |  |  |  |  | 51,115 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Issuance of vested restricted stock | 455,819 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross |  |  |  | 511 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 455,308 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | 455,819 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Preferred stock repurchased - related parties (in shares) |  |  |  | (1,649)netr_PreferredStockRepurchasedRelatedPartyDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember |  |  |  |  |  |  |  |  |  |  |
Preferred stock repurchased - related parties | (1,649,266)netr_PreferredStockRepurchasedRelatedPartyDuringPeriodValue |  |  | (16)netr_PreferredStockRepurchasedRelatedPartyDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember |  |  |  | (1,649,250)netr_PreferredStockRepurchasedRelatedPartyDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | (1,649,266)netr_PreferredStockRepurchasedRelatedPartyDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Stock Issued During Period Related Party Shares New Issues |  |  |  |  | 39,806 netr_StockIssuedDuringPeriodRelatedPartySharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Stock Issued During Period Related Party Value New Issues | 312,792 netr_StockIssuedDuringPeriodRelatedPartyValueNewIssues |  |  |  | 398 netr_StockIssuedDuringPeriodRelatedPartyValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 312,394 netr_StockIssuedDuringPeriodRelatedPartyValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | 312,792 netr_StockIssuedDuringPeriodRelatedPartyValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Common stock repurchased (in shares) |  |  |  |  | (6,579)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Common stock repurchased | (47,194)us-gaap_StockRepurchasedDuringPeriodValue |  |  |  | (66)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | (47,128)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | (47,194)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Common stock repurchased - related parties (in shares) |  |  |  |  | (21,000)netr_StockRepurchasedRelatedPartyDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Common stock repurchased - related parties | (165,018)netr_StockRepurchasedRelatedPartyDuringPeriodValue |  |  |  | (210)netr_StockRepurchasedRelatedPartyDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | (164,808)netr_StockRepurchasedRelatedPartyDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  | (165,018)netr_StockRepurchasedRelatedPartyDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Dividends paid/reinvested (in shares) |  |  |  |  | 277,660 us-gaap_CommonStockDividendsShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Dividends paid/reinvested | (3,563,053)netr_DividendsCashPaidAndReinvested |  |  |  | 2,777 netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 2,624,536 netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (6,190,366)netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember |  | (3,563,053)netr_DividendsCashPaidAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Dividends declared/reinvested ( in shares) |  |  |  |  | 72,701 netr_DividendDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Dividends declared/reinvested | (997,175)netr_DividendsCashDeclaredAndReinvested |  |  |  | 727 netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 689,941 netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | (1,687,843)netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember |  | (997,175)netr_DividendsCashDeclaredAndReinvested / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Contributions from noncontrolling interests net of distributions paid |  |  |  |  |  |  |  |  |  |  |  | (7,825,054)netr_ContributedCapitalLessDistributionsOfNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (7,825,054)netr_ContributedCapitalLessDistributionsOfNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Ending balance at Dec. 31, 2014 | $ 60,733,884 us-gaap_StockholdersEquity |  |  | $ 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember | $ 168,874 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | $ 143,715,876 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | $ (83,150,866)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedDistributionsInExcessOfNetIncomeMember | $ 10,802,449 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 71,536,333 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |
Ending balance (in shares) at Dec. 31, 2014 |  |  |  | 0 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = netr_RedeemableConvertibleSeries63PreferredStockMember | 16,887,377 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |

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