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INVESTMENT IN AVAILABLE FOR SALE MARKETABLE SECURITIES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
INVESTMENT IN AVAILABLE FOR SALE MARKETABLE SECURITIES
Beginning Balance	$ 382,144	$ 0
Additions	0	552,527
Recognized losses	(239,869)	(170,383)
Ending Balance	$ 142,275	$ 382,144

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- References

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Namespace Prefix:	nixx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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Namespace Prefix:	nixx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Name:	nixx_RecognizedLosses
Namespace Prefix:	nixx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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