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Leases (Details)	12 Months Ended
	Jan. 31, 2021 USD ($)
Disclosure Text Block [Abstract]
Amount of monthly rent	$ 4,200

X

- Definition

Amount of monthly rent.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureTextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration