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Note 17 - Other Income (Details Textual) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Aug. 01, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Write Down of Intangible Assets and Capitalized Contract Costs |  | $ 3,513 | $ 0 | $ 3,513 | $ 0
Purchase Agreement With DISH Wireless LLC [Member] |  |  |  |  |
Purchase Agreement, Duration of Monthly Fees (Year) | 10 years |  |  |  |
Purchase Agreement, Income |  | $ 4,603 | $ 0 | $ 4,603 | $ 0
Write Down of Intangible Assets and Capitalized Contract Costs | $ 3,500 |  |  |  |

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
- Definition The amount of write down of intangible assets and capitalized contract costs. + References No definition available. + Details
Name: | tcx_WriteDownOfIntangibleAssetsAndCapitalizedContractCosts
Namespace Prefix: | tcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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