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Note 4 - Acquisitions (Details Textual) - USD ($) $ in Millions	Feb. 13, 2018	Feb. 01, 2017	Jan. 20, 2017	Feb. 27, 2015
Ting Virginia LLC [Member]
Business Combination, Consideration Transferred, Total	$ 1.2
Payments for Repurchase of Redeemable Noncontrolling Interest	$ 1.2
Repurchase of Redeemable Noncontrolling Interest, Percentage	10.00%
Ting Virginia LLC [Member]
Business Acquisition, Percentage of Voting Interests Acquired		20.00%		70.00%
Business Combination, Consideration Transferred, Total		$ 2.0		$ 3.5
Ting Virginia LLC [Member] | Exercisable by the Minority Shareholders [Member]
Business Combination, Interest Subject to Call Option, Not Exercised in Period		10.00%
eNom, Incorporated [Member]
Business Combination, Consideration Transferred, Total			$ 77.8
Payments to Acquire Businesses, Gross			83.5
Business Combination, Consideration Transferred, Estimated Price Adjusments			$ 5.7

X

- Definition

Amount of estimated price adjustments that are expected to be incurred by the acquiring entity. Excludes cash.

+ References

No definition available.

+ Details

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X

- Definition

Represent the percentage of the acquiree subject to put and call option not exercised in period in a business combination.

+ References

No definition available.

+ Details

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X

- Definition

The percentage of redeemable noncontrolling interest that would be purchased during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	tcx_
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X

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477

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X

- Definition

The cash outflow during the period for redemption of redeemable noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

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X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 230
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-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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