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Note 9 - Capital Stock and Reserve - Stock Option Transactions (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 $ / shares | Mar. 31, 2023 $ / shares
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 5.87 | $ 10.06
Share options, balance | 211,300 | 224,300
Share options, granted | 198,500 | 121,000
Share options, exercised | (36,000) | (13,000)
Share options, forfeited | (30,000) | (121,000)
Share options, balance | 343,800 | 211,300
Share options, exercisable | 343,800 | 211,300
Weighted average exercise price, balance (in CAD per share) | $ 10.81 | $ 12.88
Weighted average exercise price, exercised (in CAD per share) | 3.65 | 5.98
Weighted average exercise price, forfeited (in CAD per share) | 14.83 | 14.67
Weighted average exercise price, balance (in CAD per share) | 8.46 | 10.81
Weighted average exercise price, exercisable (in CAD per share) | $ 8.46 | $ 10.81
Weighted average remaining life (years) (Year) | 2 years 7 months 9 days | 2 years 6 months 25 days
Performance stock options [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 0 | $ 0
Share options, balance | 15,000 | 15,000
Share options, granted | 0 | 0
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 15,000 | 15,000
Share options, exercisable | 0 | 0
Weighted average exercise price, balance (in CAD per share) | $ 14.25 | $ 14.25
Weighted average exercise price, balance (in CAD per share) | $ 14.25 | $ 14.25
Weighted average remaining life (years) (Year) | 9 months | 1 year 3 months
Stock options expiring March 1, 2024 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 16.5 | $ 16.5
Share options, balance | 15,000 | 15,000
Share options, granted | 0 | 0
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 15,000 | 15,000
Share options, exercisable | 15,000 | 15,000
Stock options expiring January 4, 2023 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) |  | $ 14.25
Share options, balance | 0 | 105,000
Share options, granted |  | 0
Share options, exercised |  | 0
Share options, forfeited |  | (105,000)
Share options, balance |  | 0
Share options, exercisable |  | 0
Stock options expiring March 31, 2024 [member] | Performance stock options [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 14.25 | $ 14.25
Share options, balance | 15,000 | 15,000
Share options, granted | 0 | 0
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 15,000 | 15,000
Share options, exercisable | 0 | 0
Stock Options Expiring November 14, 2024 [Member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 3.65 |
Share options, balance | 0 |
Share options, granted | 36,000 |
Share options, exercised | (36,000) |
Share options, forfeited | 0 |
Share options, balance | 0 | 0
Share options, exercisable | 0 |
Stock options expiring March 8, 2025 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 15.5 | $ 15.5
Share options, balance | 4,000 | 4,000
Share options, granted | 0 | 0
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 4,000 | 4,000
Share options, exercisable | 4,000 | 4,000
Stock options expiring September 2, 2025 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 12.75 | $ 12.75
Share options, balance | 20,000 | 0
Share options, granted | 0 | 20,000
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 20,000 | 20,000
Share options, exercisable | 20,000 | 20,000
Stock options expiring September 6, 2025 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 13.75 | $ 13.75
Share options, balance | 8,000 | 0
Share options, granted | 0 | 8,000
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 8,000 | 8,000
Share options, exercisable | 8,000 | 8,000
Stock options expiring November 20, 2025 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 4 | $ 4
Share options, balance | 6,000 | 8,000
Share options, granted | 0 | 0
Share options, exercised | 0 | (2,000)
Share options, forfeited | 0 | 0
Share options, balance | 6,000 | 6,000
Share options, exercisable | 6,000 | 6,000
Stock options expiring December 2, 2025 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 9 | $ 9
Share options, balance | 62,000 | 0
Share options, granted | 0 | 62,000
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 62,000 | 62,000
Share options, exercisable | 62,000 | 62,000
Stock options expiring December 13, 2025 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 9.5 | $ 9.5
Share options, balance | 31,000 | 0
Share options, granted | 0 | 31,000
Share options, exercised | 0 | 0
Share options, forfeited | (10,000) | 0
Share options, balance | 21,000 | 31,000
Share options, exercisable | 21,000 | 31,000
Stock options expiring January 15, 2026 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 7.25 | $ 7.25
Share options, balance | 35,300 | 41,300
Share options, granted | 0 | 0
Share options, exercised | 0 | (6,000)
Share options, forfeited | 0 | 0
Share options, balance | 35,300 | 35,300
Share options, exercisable | 35,300 | 35,300
Stock options expiring August 25, 2026 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 5.65 |
Share options, balance | 0 |
Share options, granted | 17,500 |
Share options, exercised | 0 |
Share options, forfeited | 0 |
Share options, balance | 17,500 | 0
Share options, exercisable | 17,500 |
Stock options expiring October 21, 2026 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) |  | $ 5.25
Share options, balance | 0 | 5,000
Share options, granted |  | 0
Share options, exercised |  | (5,000)
Share options, forfeited |  | 0
Share options, balance |  | 0
Share options, exercisable |  | 0
Stock options expiring September 6, 2026 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 6.6 |
Share options, balance | 0 |
Share options, granted | 40,000 |
Share options, exercised | 0 |
Share options, forfeited | 0 |
Share options, balance | 40,000 | 0
Share options, exercisable | 40,000 |
Stock options expiring November 1, 2026 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 7.5 | $ 7.5
Share options, balance | 10,000 | 10,000
Share options, granted | 0 | 0
Share options, exercised | 0 | 0
Share options, forfeited | 0 | 0
Share options, balance | 10,000 | 10,000
Share options, exercisable | 10,000 | 10,000
Stock options expiring December 3, 2026 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) |  | $ 12.5
Share options, balance | 0 | 6,000
Share options, granted |  | 0
Share options, exercised |  | 0
Share options, forfeited |  | (6,000)
Share options, balance |  | 0
Share options, exercisable |  | 0
Stock Options Expiring December 4, 2026 [Member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 5.47 |
Share options, balance | 0 |
Share options, granted | 20,000 |
Share options, exercised | 0 |
Share options, forfeited | 0 |
Share options, balance | 20,000 | 0
Share options, exercisable | 20,000 |
Stock options expiring January 17, 2027 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) |  | $ 20.5
Share options, balance | 0 | 10,000
Share options, granted |  | 0
Share options, exercised |  | 0
Share options, forfeited |  | (10,000)
Share options, balance |  | 0
Share options, exercisable |  | 0
Stock options expiring February 16, 2027 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 17.5 | $ 17.5
Share options, balance | 20,000 | 20,000
Share options, granted | 0 | 0
Share options, exercised | 0 | 0
Share options, forfeited | (20,000) | 0
Share options, balance | 0 | 20,000
Share options, exercisable | 0 | 20,000
Stock options expiring September 6, 2028 [member] |  |
Statement Line Items [Line Items] |  |
Share options, exercise price (in CAD per share) | $ 6.6 |
Share options, balance | 0 |
Share options, granted | 85,000 |
Share options, exercised | 0 |
Share options, forfeited | 0 |
Share options, balance | 85,000 | 0
Share options, exercisable | 85,000 |

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