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Note 10 - Common Shares (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Share Repurchases [Table Text Block] |
|  | Year Ended December 31, |
|  | 201 7 |  |  | 201 6 |  |  | 201 5 |
Common stock repurchased on the open market or through tender offer |  |  |  |  |  |  |  |  |  |  |  |
Number of shares |  |  | — |  |  |  | 308,416 |  |  |  | 1,062,456 |
Aggregate market value of shares (in thousands) |  | $ | — |  |  | $ | 7,180 |  |  | $ | 23,616 |
Average price per share |  | $ | — |  |  | $ | 23.28 |  |  | $ | 22.23 |
Common stock received in connection with share-based compensation |  |  |  |  |  |  |  |  |  |  |  |
Number of shares |  |  | 50,454 |  |  |  | 25,572 |  |  |  | 99,675 |
Aggregate market value of shares (in thousands) |  | $ | 2,602 |  |  | $ | 634 |  |  | $ | 2,335 |
Average price per share |  | $ | 51.58 |  |  | $ | 24.80 |  |  | $ | 23.42 |

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- Definition The entire disclosure for share repurchases. + References No definition available. + Details
Name: | tcx_ShareRepurchasesTableTextBlock
Namespace Prefix: | tcx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration