Note 5 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Operating lease assets	$ 9,336	$ 8,998	[1]
Finance lease assets	2,004	2,330
Total leased assets	11,337	11,328
Current operating lease liabilities	1,013	688	[1]
Current finance lease liabilities	641	660
Long-term operating lease liabilities	8,995	8,889	[1]
Long term finance lease liabilities	845	1,152
Total, present value of lease liabilities	$ 11,494	$ 11,389

[1] The balance sheet at December 31, 2020 has been derived from the audited financial statements at that date