XML 77 R64.htm IDEA: XBRL DOCUMENT v3.23.1
Capital stock (Details 1)
12 Months Ended
Dec. 31, 2022
shares
$ / shares
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2020
shares
$ / shares
Options      
Balance | shares 807,150 1,326,958 1,428,408
Granted | shares 20,000 90,000 0
Forfeited, cancelled or expired | shares (188,750) (609,808) (101,450)
Balance | shares 638,400 807,150 1,326,958
Options exercisable, end of period | shares 602,400 706,750 1,110,958
Weighted average exercise price      
Balance | $ / shares $ 3.73 $ 3.67 $ 3.67
Granted | $ / shares 1.2 1.1 0
Forfeited, cancelled or expired | $ / shares (5.77) (2.99) (5.06)
Balance | $ / shares 3.05 3.73 3.67
Options exercisable, end of period | $ / shares $ 2.93 $ 3.49 $ 3.12