Note 7 - Capital Shares - Vested Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member]	Sep. 30, 2025 shares
Fully-vested RSUs, number (in shares)	137,918
Fully-vested RSUs, exercisable (in shares)	137,918
RSUs, vesting in the next 12 months, number (in shares)	250,822
RSUs, vesting in the next 12 months, exercisable (in shares)	76,086
RSUs, vesting from 13-24 months, number (in shares)	434,321
RSUs, vesting from 13-24 months, exercisable (in shares)	78,435
RSUs, vesting after 24 months, number (in shares)	420,592
RSUs, vesting after 24 months, exercisable (in shares)	40,880
RSUs, number (in shares)	1,243,653
RSUs, exercisable (in shares)	333,319