Note 9 - Leases, Right-of-use Assets and Related Liabilities - Right-of-use Assets Under Operating and Financing Leases and Operating and Financing Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating right-of-use assets	$ 2,414	$ 133
Finance right-of-use assets	27,297	176
Total	29,711	309
Operating lease liabilities (current)	772	172
Operating lease liabilities (long-term)	1,902	0
Total, operating lease	2,674	172
Finance lease liabilities (current)	3,413	10
Finance lease liabilities (long-term)	17,797	162
Total, finance lease	$ 21,210	$ 172