Note 7 - Stock Plans - Unrecognized Stock-based Compensation Expense (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Unrecognized stock-based compensation expense	$ 1,734
The 2012 Director Stock Incentive Plan [Member]
Unrecognized stock-based compensation expense	90
The 2012 Omnibus Stock Incentive Plan [Member]
Unrecognized stock-based compensation expense	91
The 2022 Omnibus Stock Incentive Plan [Member]
Unrecognized stock-based compensation expense	$ 1,553