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v3.20.1

Note 10 - Revenue 1 (Details Textual) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |
Number of Customers | 0 | 0
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |
Number of Customers | 0 | 0
Minimum [Member] |  |
Domain Services, Purchased Term (Year) | 1 year |
Finite-Lived Intangible Asset, Useful Life (Year) | 2 years |
Minimum [Member] | Active Domain Name Contracts [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 1 year |
Maximum [Member] |  |
Domain Services, Purchased Term (Year) | 10 years |
Finite-Lived Intangible Asset, Useful Life (Year) | 15 years |
Maximum [Member] | Active Domain Name Contracts [Member] |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |

X
- Definition Represents the purchased term for domain services. + References No definition available. + Details
Name: | tcx_DomainServicesPurchasedTerm
Namespace Prefix: | tcx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of customers as defined by the entity. + References No definition available. + Details
Name: | tcx_NumberOfCustomers
Namespace Prefix: | tcx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=tcx_ActiveDomainNameContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |