RECEIVABLES (Narrative) (Details) - USD ($)	Jan. 31, 2021	Jan. 31, 2020
RECEIVABLE [abstract]
Accounts receivable more than 90 days past due	$ 1,975	$ 40,911

Represents amount of accounts receivable more than 90 days past due.

No definition available.

Name:	cxxif_AccountsReceivableMoreThanNinetyDaysPastDue
Namespace Prefix:	cxxif_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant