Note 5 - Financial Instruments and Fair Value Measurements - Summary of Cash Equivalents' Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Reported Value Measurement [Member]
Total assets	$ 12,191	$ 1,819
Reported Value Measurement [Member] \| Fair Value, Recurring [Member]
Derivative liability	292
Total liabilities	292
Reported Value Measurement [Member] \| Money Market Funds [Member]
Money market funds	12,191	1,819
Estimate of Fair Value Measurement [Member]
Total assets	12,191	1,819
Estimate of Fair Value Measurement [Member] \| Fair Value, Recurring [Member]
Derivative liability	292
Total liabilities	292
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Total assets	12,191	1,819
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Derivative liability	0
Total liabilities	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Total assets	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member] \| Fair Value, Recurring [Member]
Derivative liability	0
Total liabilities	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Total assets	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Derivative liability	292
Total liabilities	292
Estimate of Fair Value Measurement [Member] \| Money Market Funds [Member]
Money market funds	12,191	1,819
Estimate of Fair Value Measurement [Member] \| Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Money market funds	12,191	1,819
Estimate of Fair Value Measurement [Member] \| Money Market Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Money market funds	0	0
Estimate of Fair Value Measurement [Member] \| Money Market Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Money market funds	$ 0	$ 0