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Note 7 - Loan Payable (Details Textual) $ in Millions	Jan. 20, 2017	Mar. 31, 2021	Jun. 14, 2019 USD ($)
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 240
Maximum Total Funded Debt to EBITDA Ratio		3.50
Minimum Fixed Charge Coverage Ratio		3
Percentage of Forecasted Capital Expenditures, Threshold for Annual Capital Expenditures		110.00%
Total Funded Debt to EBITDA Ratio		2
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Guaranteed Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			180
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Accordion Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 60
Bank of Montreal and Royal Bank of Canada [Member]
Debt Instrument, Term (Year)	4 years

X

- Definition

Ratio of total funded debt to EDITDA that triggers obligation to repay 50% of excess cash flow as defined under the credit agreement.

+ References

No definition available.

+ Details

Name:	tcx_MaximumTotalFundedDebtToEBITDARatio
Namespace Prefix:	tcx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The minimum fixed charge coverage ratio.

+ References

No definition available.

+ Details

Name:	tcx_MinimumFixedChargeCoverageRatio
Namespace Prefix:	tcx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the threshold for annual capital expenditures as a percentage of forecasted capital expenditure.

+ References

No definition available.

+ Details

Name:	tcx_PercentageOfForecastedCapitalExpendituresThresholdForAnnualCapitalExpenditures
Namespace Prefix:	tcx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Ratio of total funded debt to EDITDA.

+ References

No definition available.

+ Details

Name:	tcx_TotalFundedDebtToEBITDARatio
Namespace Prefix:	tcx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=tcx_RoyalBankBankOfMontrealBankOfNovaScotiaHsbcAndCibcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=tcx_GuaranteedCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=tcx_AccordionFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=tcx_BankOfMontrealAndRoyalBankOfCanadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: