Note 3 - Fair Value Measurements - Fair Value of Assets Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Cash in savings account	$ 4,117	$ 2,496
Fair Value, Inputs, Level 1 [Member]
Cash in savings account	0	0
Fair Value, Inputs, Level 2 [Member]
Cash in savings account	0	0
Fair Value, Inputs, Level 3 [Member]
Cash in savings account	0	0
Savings Account [Member]
Cash in savings account	3,875	2,258
Savings Account [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash in savings account	0	0
Savings Account [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash in savings account	0	0
Savings Account [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash in savings account	0	0
Demand Deposits [Member]
Cash in savings account	242	238
Demand Deposits [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash in savings account	0	0
Demand Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash in savings account	0	0
Demand Deposits [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash in savings account	$ 0	$ 0