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Note 2 - Basis of Presentation (Details Textual) - Decrease in Net Revenues and Sales and Marketing Expense [Member] $ in Millions | 3 Months Ended
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Sep. 30, 2016 USD ($)
Three Months Ended September 30, 2015 [Member] |
Prior Period Reclassification Adjustment | $ 0.3
Nine Months Ended September 30, 2015 [Member] |
Prior Period Reclassification Adjustment | 0.9
Six Months Ended June 30, 2016 [Member] |
Prior Period Reclassification Adjustment | $ 1.1

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- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
Name: | us-gaap_CreationDateAxis=tcx_ThreeMonthsEndedSeptember302015Member
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: |

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