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Intangible Assets and Goodwill (Details Textual)	12 Months Ended
	Jan. 31, 2019 USD ($)
Intangible Assets (Textual)
Amortization expense of intangible assets	$ 18,930

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- Definition

Amortization expense of intangible assets.

+ References

No definition available.

+ Details

Name:	ntrb_AmortizationExpenseOfIntangibleAssets
Namespace Prefix:	ntrb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	ntrb_IntangibleAssetsTextualAbstract
Namespace Prefix:	ntrb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration