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Note 12 - Leases (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 7 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019
Lessee, Operating Lease, Renewal Term (Year) | 5 years |  | 5 years | 5 years |
Lessee, Operating Lease, Option to Terminate Term (Year) |  |  |  | 1 year |
Lessee, Operating Lease, Option to Extend, Amount |  |  |  | $ 600 |
Lessee, Operating Lease, Lease Not yet Commenced, Future Minimum Payments Due | $ 500 |  | $ 500 | 500 |
Increase (Decrease) in Operating Lease, Right-of-Use Asset | $ 1,030 | $ 86 |  | $ 1,941 | $ 4,554
Corporate Office Lease [Member] |  |  |  |  |
Increase (Decrease) in Operating Lease, Right-of-Use Asset |  |  | 300 |  |
Increase (Decrease) in Operating Lease Liability |  |  | $ 600 |  |
Minimum [Member] |  |  |  |  |
Lessee, Operating Lease, Remaining Lease Term (Year) | 1 year |  | 1 year | 1 year |
Maximum [Member] |  |  |  |  |
Lessee, Operating Lease, Remaining Lease Term (Year) | 20 years |  | 20 years | 20 years |

X
- Definition The amount of increase (decrease) in operating lease liability. + References No definition available. + Details
Name: | tcx_IncreaseDecreaseInOperatingLeaseLiability
Namespace Prefix: | tcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of increase (decrease) of lessee's right to use underlying asset under operating lease. + References No definition available. + Details
Name: | tcx_IncreaseDecreaseInOperatingLeaseRightofuseAsset
Namespace Prefix: | tcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of required minimum rental payments for lessee's operating lease that has not yet commenced. + References No definition available. + Details
Name: | tcx_LesseeOperatingLeaseLeaseNotYetCommencedFutureMinimumPaymentsDue
Namespace Prefix: | tcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References No definition available. + Details
Name: | tcx_LesseeOperatingLeaseOptionToExtendAmount
Namespace Prefix: | tcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Term of lessee's operating lease option to terminate lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | tcx_LesseeOperatingLeaseOptionToTerminateTerm
Namespace Prefix: | tcx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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