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Note 11 - Costs to Obtain and Fulfill a Contract (Details Textual) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Increase (Decrease) in Capitalized Costs	$ 129,900
Capitalized Contract Cost, Amortization	125,800
Deferred Costs of Acquisition [Member]
Capitalized Contract Cost, Impairment Loss	$ 0
Deferred Costs of Acquisition [Member] | Minimum [Member]
Capitalized Contract Cost, Amortization Period (Year)	1 year
Deferred Costs of Acquisition [Member] | Maximum [Member]
Capitalized Contract Cost, Amortization Period (Year)	10 years

X

- Definition

Amount of increase (decrease) in capitalization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

No definition available.

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Namespace Prefix:	tcx_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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X

- Definition

Amortization period of cost capitalized in obtaining or fulfilling contract with customer, 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 340
-SubTopic 40
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131251-203054

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X

- Definition

Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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