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Label	Element	Value
Minimum [Member]
Commodity Contract Length	nix_CommodityContractLength	1 year
Maximum [Member]
Commodity Contract Length	nix_CommodityContractLength	3 years
Forward May 22 [Member]
Forward Contract Indexed to Issuer's Equity, Shares	us-gaap_ForwardContractIndexedToIssuersEquityShares	10,390,000

X

- Definition

Commodity Contract Length

+ References

No definition available.

+ Details

Name:	nix_CommodityContractLength
Namespace Prefix:	nix_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Maximum number of shares that could be issued to settle forward contract indexed to equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

+ Details

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

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=nix_ForwardMay22Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: