Note 5 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Total Assets	$ 57	$ 598
Convertible notes payable	(2,590)
Total Liabilities	(7,681)	(604)
Embedded Derivative Financial Instruments, Convertible Promissory Note [Member]
Derivative liability		(299)
Embedded Derivative Financial Instruments, Convertible Notes [Member]
Derivative liability	(2)	(305)
ELOC Derivative Liability [Member]
Derivative liability	(5,089)
Fair Value, Inputs, Level 1 [Member]
Total Assets	57	598
Convertible notes payable	0
Total Liabilities	0	0
Fair Value, Inputs, Level 1 [Member] | Embedded Derivative Financial Instruments, Convertible Promissory Note [Member]
Derivative liability		0
Fair Value, Inputs, Level 1 [Member] | Embedded Derivative Financial Instruments, Convertible Notes [Member]
Derivative liability	0	0
Fair Value, Inputs, Level 1 [Member] | ELOC Derivative Liability [Member]
Derivative liability
Fair Value, Inputs, Level 2 [Member]
Total Assets	0	0
Convertible notes payable	0
Total Liabilities	0	0
Fair Value, Inputs, Level 2 [Member] | Embedded Derivative Financial Instruments, Convertible Promissory Note [Member]
Derivative liability		0
Fair Value, Inputs, Level 2 [Member] | Embedded Derivative Financial Instruments, Convertible Notes [Member]
Derivative liability	0	0
Fair Value, Inputs, Level 2 [Member] | ELOC Derivative Liability [Member]
Derivative liability
Fair Value, Inputs, Level 3 [Member]
Total Assets	0	0
Convertible notes payable	(2,590)
Total Liabilities	(7,681)	(604)
Fair Value, Inputs, Level 3 [Member] | Embedded Derivative Financial Instruments, Convertible Promissory Note [Member]
Derivative liability		(299)
Fair Value, Inputs, Level 3 [Member] | Embedded Derivative Financial Instruments, Convertible Notes [Member]
Derivative liability	(2)	(305)
Fair Value, Inputs, Level 3 [Member] | ELOC Derivative Liability [Member]
Derivative liability	(5,089)
Money Market Funds [Member]
Cash equivalents	57	598
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	57	598
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents	$ 0	$ 0