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Segment Information: Sales in excess of ten percent of total sales (Details) - USD ($)	6 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Segment Reporting [Abstract]
Sales to customers in excess of 10% of total sales	$ 13,029,830	$ 7,591,948

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- Definition

Represents the monetary amount of Sales to customers in excess of 10% of total sales, during the indicated time period.

+ References

No definition available.

+ Details

Name:	jctcf_SalesToCustomersInExcessOf10OfTotalSales
Namespace Prefix:	jctcf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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