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Note 9 - Guarantees (Details Textual)	12 Months Ended
Note 9 - Guarantees (Details Textual)	Sep. 29, 2018
Standard Product Warranty Period	1 year 90 days

X

- Definition

Standard product warranty period.

+ References

No definition available.

+ Details

Name:	tcco_StandardProductWarrantyPeriod
Namespace Prefix:	tcco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration