Note 7 - Share-based Compensation - RSU and PSA Activity (Details) - Restricted Stock Units and Performance Stock Awards [Member]	9 Months Ended
	Sep. 30, 2026 $ / shares shares
Unvested RSUs and PSAs (in shares) | shares	229,797	[1]
Unvested RSUs and PSAs, weighted average grant date fair value (in dollars per share) | $ / shares	$ 37.12
RSUs and PSAs granted (in shares) | shares	69,545	[1]
RSUs and PSAs granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 73.25
Unvested RSUs and PSAs canceled (in shares) | shares	(17,114)	[1]
Unvested RSUs and PSAs canceled, weighted average grant date fair value (in dollars per share) | $ / shares	$ 43.59
RSUs and PSAs vested (in shares) | shares	(118,349)	[1],[2]
RSUs and PSAs vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 34.75	[2]
Unvested RSUs and PSAs (in shares) | shares	163,879	[1]
Unvested RSUs and PSAs, weighted average grant date fair value (in dollars per share) | $ / shares	$ 53.48

[1] The number of PSAs disclosed in this table are at the target level of 100%.

[2] For the PSAs vested on March 31, 2026, the actual number of common shares that were issued was determined by multiplying the PSAs at the target level of 100%, as disclosed in this table, by a payout percentage based on the performance-based conditions achieved. The payout percentage was 117% for the 2023-2025 performance period, 130% for the 2024-2025 performance period, and 109% for the 2025 performance period.