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Note 11 - Contract Costs - Capitalized Contract Costs Activity (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Balance | $ 1,390 |
Deferred Costs of Acquisition [Member] |  |
Balance | 1,404 | [1]
Capitalization of costs | 913 |
Amortization of costs | (927) |
Balance | 1,390 |
Domain Registration Costs [Member] |  |
Balance | 127,003 | [2]
Capitalization of costs | 163,447 |
Amortization of costs | (183,923) |
Balance | $ 106,527 | [2]
[1] | The beginning balance consists entirely of a cumulative adjustment recorded on January 1, 2018 as a result of the modified retrospective adoption of Topic 606. See Note 2 &#8211; &#8220;Recent accounting pronouncements&#8221; of Notes to Consolidated Financial Statements for more information.
[2] | As a result of the bulk transfer of 2.8 million domain names to Namecheap throughout 2018, recognized costs for the year ended December 31, 2018 includes $16.7 million related to previously deferred prepaid registry fees, a portion of which would have otherwise been recognized after December 31, 2018.

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- 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. + Details
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Namespace Prefix: | tcx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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Balance Type: | debit
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |