XML 101 R36.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Lease Intangibles (Net Value of Other Intangible Assets and Amortization by Class) (Detail) - USD ($) | Jun. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |  |
Lease intangibles | $ 13,383,080 | $ 13,811,291 | $ 13,845,100
Accumulated amortization | (8,501,656) | (7,944,757) | (5,829,342)
Lease intangibles, net | 4,881,424 | 5,866,534 | 8,015,758
Leases, Acquired-in-Place [Member] |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Lease intangibles | 6,635,928 | 6,872,980 | 6,903,882
Accumulated amortization | (4,150,414) | (3,840,670) | (2,647,002)
Lease intangibles, net | 2,485,514 | 3,032,310 | 4,256,880
Leasing Cost [Member] |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Lease intangibles | 4,622,792 | 4,813,951 | 4,816,858
Accumulated amortization | (2,709,250) | (2,517,759) | (1,766,578)
Lease intangibles, net | 1,913,542 | 2,296,192 | 3,050,280
Above Market Leases [Member] |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Lease intangibles | 2,124,360 | 2,124,360 | 2,124,360
Accumulated amortization | (1,641,992) | (1,586,328) | (1,415,762)
Lease intangibles, net | $ 482,368 | $ 538,032 | $ 708,598

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=netr_LeasingCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |