The indefinite life intangible assets are summarized below.
| Orbital slots | Trade name | Intellectual property | Total
indefinite life intangibles | |||||||||||||
| Cost as at January 1, 2016 | $ | 610,611 | $ | 17,000 | $ | — | $ | 627,611 | ||||||||
| Additions | — | — | 13,161 | 13,161 | ||||||||||||
| Disposals/retirements | — | — | — | — | ||||||||||||
| Impact of foreign exchange | (1,214 | ) | — | — | (1,214 | ) | ||||||||||
| Cost as at December 31, 2016 and January 1, 2017 | 609,397 | 17,000 | 13,161 | 639,558 | ||||||||||||
| Additions | — | — | 12,577 | 12,577 | ||||||||||||
| Disposals/retirements | — | — | — | — | ||||||||||||
| Impact of foreign exchange | (2,654 | ) | — | — | (2,654 | ) | ||||||||||
| Cost as at December 31, 2017 | $ | 606,743 | $ | 17,000 | $ | 25,738 | $ | 649,481 | ||||||||
| Accumulated impairment as at January 1, 2016 | $ | (1,100 | ) | $ | — | $ | — | $ | (1,100 | ) | ||||||
| Impairment | — | — | — | — | ||||||||||||
| Accumulated impairment as at December 31, 2016 and January 1, 2017 | (1,100 | ) | — | — | (1,100 | ) | ||||||||||
| Impairment | — | — | — | — | ||||||||||||
| Accumulated impairment as at December 31, 2017 | $ | (1,100 | ) | $ | — | $ | — | $ | (1,100 | ) | ||||||
| Net carrying values | ||||||||||||||||
| As at December 31, 2016 | $ | 608,297 | $ | 17,000 | $ | 13,161 | $ | 638,458 | ||||||||
| As at December 31, 2017 | $ | 605,643 | $ | 17,000 | $ | 25,738 | $ | 648,381 | ||||||||