Note 4 - Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Warrant liabilities (Note 14)	$ 13	$ 185
Fair Value, Recurring [Member]
Warrant liabilities (Note 14)	13	185
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Warrant liabilities (Note 14)	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Warrant liabilities (Note 14)	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Warrant liabilities (Note 14)	$ 13	$ 185