Note 3 - Fair Value Measurements - Fair Value of Assets Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Cash and cash equivalent	$ 980	$ 2,371
Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalent	2	2
Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalent	0	0
Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalent	0	0
Money Market Funds [Member]
Cash and cash equivalent	2	2
Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalent	2	2
Money Market Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalent	0	0
Money Market Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalent	0	0
Savings Account [Member]
Cash and cash equivalent	624	2,058
Savings Account [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalent	0	0
Savings Account [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalent	0	0
Savings Account [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalent	0	0
Demand Deposits [Member]
Cash and cash equivalent	354	311
Demand Deposits [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalent	0	0
Demand Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalent	0	0
Demand Deposits [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalent	$ 0	$ 0