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Note 2 - Significant Accounting Policies - Intangible Asset Useful Life (Details)	12 Months Ended
	Dec. 31, 2017
Minimum [Member]
Depreciation term (Year)	4 years
Maximum [Member]
Depreciation term (Year)	15 years
Technology-Based Intangible Assets [Member]
Depreciation term (Year)	2 years
Brand [Member]
Depreciation term (Year)	7 years
Customer Relationships [Member] | Minimum [Member]
Depreciation term (Year)	4 years
Customer Relationships [Member] | Maximum [Member]
Depreciation term (Year)	7 years
Network Rights [Member]
Depreciation term (Year)	15 years

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

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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

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=tcx_BrandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: