Note 6 - Capital Shares - Vested Restricted Stock Units (Details) - Restricted Stock Units (RSUs) [Member]	Jun. 30, 2025 shares
Fully-vested RSUs, number (in shares)	117,967
Fully-vested RSUs, exercisable (in shares)	117,967
RSUs, vesting in the next 12 months, number (in shares)	262,090
RSUs, vesting in the next 12 months, exercisable (in shares)	21,828
RSUs, vesting from 13-24 months, number (in shares)	403,062
RSUs, vesting from 13-24 months, exercisable (in shares)	22,364
RSUs, vesting after 24 months, number (in shares)	485,455
RSUs, vesting after 24 months, exercisable (in shares)	14,087
RSUs, number (in shares)	1,268,574
RSUs, exercisable (in shares)	176,246