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Operating Expenses (Details) - Schedule of cost of equipment sales included in the cost of sales - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of cost of equipment sales included in the cost of sales [Abstract] |  |  |
Cost of equipment sale | $ 6,210 | $ 10,416 | $ 7,003

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- Definition Amount of cost of equipment sale. + References No definition available. + Details
Name: | tsat_CostOfEquipmentSale
Namespace Prefix: | tsat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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