Name:	netr_ContributedCapitalLessDistributionsOfNoncontrollingInterests
Namespace Prefix:	netr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The number of shares to be issued in the following period for dividends declared in the current period

No definition available.

Name:	netr_DividendDeclaredAndReinvested
Namespace Prefix:	netr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Equity impact of cash dividends declared by an entity during the period for all classes of stock (common, preferred, etc.) that were reinvested.

No definition available.

Name:	netr_DividendsCashDeclaredAndReinvested
Namespace Prefix:	netr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Equity impact of cash dividends declared by an entity during the period for all classes of stock (common, preferred, etc.) that were reinvested.

No definition available.

Name:	netr_DividendsCashPaidAndReinvested
Namespace Prefix:	netr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number of preferred shares that have been repurchased from related parties during the period and have not been retired and are not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

No definition available.

Name:	netr_PreferredStockRepurchasedRelatedPartyDuringPeriodShares
Namespace Prefix:	netr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Equity impact of the value of preferred stock that has been repurchased from related parties during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

No definition available.

Name:	netr_PreferredStockRepurchasedRelatedPartyDuringPeriodValue
Namespace Prefix:	netr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Numbers of shares that have been repurchased from related parties during the period and have not been retired and are not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

No definition available.

Name:	netr_StockIssuedDuringPeriodRelatedPartySharesNewIssues
Namespace Prefix:	netr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Equity impact of the value of new stock issued during the period to related parties. Includes shares issued in an initial public offering or a secondary public offering.

No definition available.

Name:	netr_StockIssuedDuringPeriodRelatedPartyValueNewIssues
Namespace Prefix:	netr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number of shares that have been repurchased from related parties during the period and have not been retired and are not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

No definition available.

Name:	netr_StockRepurchasedRelatedPartyDuringPeriodShares
Namespace Prefix:	netr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Equity impact of the value of stock that has been repurchased from related parties during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

No definition available.

Name:	netr_StockRepurchasedRelatedPartyDuringPeriodValue
Namespace Prefix:	netr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Number of shares of common stock issued as dividends during the period. Excludes stock splits.

Name:	us-gaap_CommonStockDividendsShares
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Name Accounting Standards Codification

-Topic 505

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

Name:	us-gaap_CommonStockSharesOutstanding
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683

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-Topic 225

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-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.13)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_IncomeLossFromContinuingOperations
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 4.E)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section E

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29-31)

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

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-Article 5

Name:	us-gaap_StockholdersEquity
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Number of shares of stock issued during the period pursuant to acquisitions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Topic 505

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Name:	us-gaap_StockIssuedDuringPeriodSharesAcquisitions
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Name Accounting Standards Codification

-Topic 505

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-Paragraph 1

-Subparagraph (SX 210.3-04)

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Name:	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Value of stock issued pursuant to acquisitions during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 505

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29-31)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

Name:	us-gaap_StockIssuedDuringPeriodValueAcquisitions
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Data Type:	xbrli:monetaryItemType
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Aggregate value of stock related to Restricted Stock Awards issued during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

Name:	us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.