v3.25.4
Equities - Schedule of Stock Option Activity (Detail) - $ / shares
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of options            
Outstanding and exercisable beginning balance 153,500 307,000 460,500 629,000 926,000 2,107,000
Granted     0 0 1,825,000 120,000
Exercised     0 (150,000) (433,000) (578,000)
Expired (153,500) (153,500) (153,500) (18,500) (1,689,000) (723,000)
Outstanding and exercisable ending balance   153,500 307,000 460,500 629,000 926,000
Weighted average exercise price            
Outstanding and exercisable beginning balance $ 9.41 $ 9.41 $ 9.41 $ 9.35 $ 7.98 $ 9.13
Granted 0 0 0 0 9.41 9.57
Exercised 0 0 0 9.41 6.46 6.29
Expired 9.41 9.41 9.41 7.54 9.41 12.94
Outstanding and exercisable ending balance 0 9.41 9.41 9.41 9.35 7.98
Weighted average fair value per option            
Outstanding and exercisable beginning balance 2.98 2.73 2.48 2.22 1.72 1.82
Granted 0 0 0 0 1.98 0.82
Exercised 0 0 0 1.43 1.88 1.58
Expired 2.98 2.47 1.98 1.43 1.77 1.95
Outstanding and exercisable ending balance $ 0 $ 2.98 $ 2.73 $ 2.48 $ 2.22 $ 1.72