Note 5 - Leases - Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Operating leases, Remaining 2021	$ 433
Finance leases, Remaining 2021	185
Total, Remaining 2021	618
Operating leases, 2022	1,735
Finance leases, 2022	587
Total, 2022	2,322
Operating leases, 2023	1,737
Finance leases, 2023	333
Total, 2023	2,070
Operating leases, 2024	1,408
Finance leases, 2024	280
Total, 2024	1,688
Operating leases, 2025	1,205
Finance leases, 2025	26
Total, 2025	1,231
Operating leases, Thereafter	8,283
Finance leases, Thereafter	0
Total, Thereafter	8,283
Operating leases, total lease payments	14,801
Finance leases, total lease payments	1,411
Total, total lease payments	16,212
Operating leases, less: Interest	(5,034)
Finance leases, less: Interest	(91)
Total, less: Interest	(5,125)
Operating leases, present value of lease liabilities	9,767
Finance leases, present value of lease liabilities	1,320
Total, present value of lease liabilities	$ 11,087	$ 11,389