4. Leases: Schedule of Maturities of Contractual Obligations Relating to Operating Leases (Details)	Jul. 31, 2021 USD ($)
Details
Operating Lease Obligations Maturities Repayments Of Principal, Remainder Of Fiscal Year	$ 21,287
Operating Lease Obligations Maturities Repayments Of Principal, In Year Two	103,430
Operating Lease Obligations Maturities Repayments Of Principal, In Year Three	113,495
Operating Lease Obligations Maturities Repayments Of Principal, In Year Four	115,082
Operating Lease Obligations Maturities Repayments Of Principal, In Year Five	96,523
Operating Lease Obligations Maturities Repayments Of Principal, Thereafter	67,679
Operating Lease Obligations Maturities Repayments Of Principal	$ 517,496

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipal
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, In Year Five, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, In Year Four, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, In Year Three, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, In Year Two, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, Remainder Of Fiscal Year, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the monetary amount of Operating Lease Obligations Maturities Repayments Of Principal, Thereafter, as of the indicated date.

No definition available.

Name:	fil_OperatingLeaseObligationsMaturitiesRepaymentsOfPrincipalThereafter
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

No definition available.