Note 6 - Select Balance Sheet and Statement of Operations Information - Finance Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest expense	$ 1,443	$ 858
Accretion on long-term debt and amortization of fees	65	65
Total finance expenses	$ 1,508	$ 923