|
|
December 31, 2017 | December 31, 2016 | December 31, 2015 | ||||||
|
Royalty interest |
$ | (4,159,013 | ) | $ | (8,090,497 | ) | $ | (9,053,435 | ) |
|
Tax loss carryforwards |
2,261,886 | 3,212,368 | 2,433,008 | ||||||
|
Other |
76,820 | 124,805 | 118,541 | ||||||
|
|
$ | (1,820,307 | ) | $ | (4,753,324 | ) | $ | (6,501,886 | ) |