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Note 17 - Other Income (Details Textual) - Purchase Agreement With DISH Wireless LLC [Member] - USD ($) $ in Thousands		3 Months Ended
	Aug. 01, 2020	Mar. 31, 2021	Mar. 31, 2020
Purchase Agreement, Duration of Monthly Fees (Year)	10 years
Purchase Agreement, Income		$ 5,395	$ 0

X

- Definition

The duration of monthly fees in a purchase agreement.

+ References

No definition available.

+ Details

Name:	tcx_PurchaseAgreementDurationOfMonthlyFees
Namespace Prefix:	tcx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of income from a purchase agreement.

+ References

No definition available.

+ Details

Name:	tcx_PurchaseAgreementIncome
Namespace Prefix:	tcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=tcx_PurchaseAgreementWithDISHWirelessLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: