Name:	nka_AdditionalIncentiveDistributionRequiredPriorToRestructuring
Namespace Prefix:	nka_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the aggregate percentage of ownership of the entity by the partners.

No definition available.

Name:	nka_AggregateOwnershipInterestInPartnershipPercent
Namespace Prefix:	nka_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Per-share or per-unit amount of distribution in arrears from prior quarters.

No definition available.

Name:	nka_DistributionInArrearsFromPriorQuartersPerUnit
Namespace Prefix:	nka_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Represents the marginal percentage interest in incentive cash distributions.

No definition available.

Name:	nka_IncentiveDistributionMarginalPercentageInterestInCashDistributions
Namespace Prefix:	nka_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the period for which third party will be deemed to own notional subordinated units in connection with votes to remove and replace the entity's managing member.

No definition available.

Name:	nka_IncentiveDistributionPeriodForWhichThirdPartyWillBeDeemedToOwnNotionalSubordinatedUnits
Namespace Prefix:	nka_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	nka_OwnershipInterestLineItems
Namespace Prefix:	nka_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the number of notional subordinated units owned by a third party in connection with votes to remove and replace the entity's managing member.

No definition available.

Name:	nka_PartnersCapitalAccountNotionalSubordinatedUnits
Namespace Prefix:	nka_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of subordinated partner units outstanding.

No definition available.

Name:	nka_PartnersCapitalAccountSubordinatedUnitsOutstanding
Namespace Prefix:	nka_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Per-share or per-unit amount of incentive dividend declared and paid to managing member or general partner.

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 S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 72

-URI http://asc.fasb.org/extlink&oid=6926462&loc=SL5163672-159010

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 55

-Paragraph 103

-URI http://asc.fasb.org/extlink&oid=6926531&loc=SL5199526-159011

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 73

-URI http://asc.fasb.org/extlink&oid=6926462&loc=SL5163674-159010

Name:	us-gaap_IncentiveDistributionDistributionPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The number of limited partner units outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section F