Note 12 - Leases (Details Textual) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Lessee, Operating Lease, Renewal Term	5 years
Lessee, Operating Lease, Option to Terminate Term	1 year
Lessee, Operating Lease, Option to Extend, Amount	$ 0.6
Lessee, Operating Lease, Lease Not yet Commenced, Future Minimum Payments Due	$ 0.9
Minimum [Member]
Operating Lease, Remaining Lease Term	1 year
Maximum [Member]
Operating Lease, Remaining Lease Term	19 years

Amount of required minimum rental payments for lessee's operating lease that has not yet commenced.

No definition available.

Name:	tcx_LesseeOperatingLeaseLeaseNotYetCommencedFutureMinimumPaymentsDue
Namespace Prefix:	tcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

- 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

- Definition

Remaining lease term for operating 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_OperatingLeaseRemainingLeaseTerm
Namespace Prefix:	tcx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: