Note 13 - Fair Value Measurements - Fair Value of Liabilities on Recurring Basis (Details) - Fair Value, Recurring [Member] $ in Thousands	Dec. 31, 2022 USD ($)
Derivative warrant liability	$ 69
Total liabilities at fair value	69
Fair Value, Inputs, Level 1 [Member]
Derivative warrant liability	0
Total liabilities at fair value	0
Fair Value, Inputs, Level 2 [Member]
Derivative warrant liability	0
Total liabilities at fair value	0
Fair Value, Inputs, Level 3 [Member]
Derivative warrant liability	69
Total liabilities at fair value	$ 69