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Note 20 - Subsequent Events (Details Textual) $ in Millions | Feb. 09, 2021 USD ($) | Dec. 31, 2020 | Feb. 13, 2020 USD ($) | Feb. 12, 2020 USD ($) | Dec. 31, 2019
--- | --- | --- | --- | --- | ---
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] |  |  |  |  |
Total Funded Debt to EBITDA Ratio |  | 2 |  |  | 2
Stock Buyback Program 2021 [Member] | Subsequent Event [Member] |  |  |  |  |
Stock Repurchase Program, Authorized Amount | $ 40 |  |  |  |
Stock Buyback Program 2020 [Member] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  | $ 40 | $ 40 |

X
- Definition Ratio of total funded debt to EDITDA. + References No definition available. + Details
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Namespace Prefix: | tcx_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |