Note 17 - Stock-based Compensation - Unrecognized Stock-based Compensation Expense (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Remainder of 2021	$ 2,276
2022	2,867
2023	1,835
2024	769
2025	450
2026	44
Total estimated expense	8,241
Stock Appreciation Rights (SARs) [Member]
Remainder of 2021	175
2022	305
2023	230
2024	124
2025	65
2026	9
Total estimated expense	908
Restricted Stock [Member]
Remainder of 2021	651
2022	1,106
2023	894
2024	645
2025	385
2026	35
Total estimated expense	3,716
Restricted Stock Units (RSUs) [Member]
Remainder of 2021	158
2022	3
2023	0
2024	0
2025	0
2026	0
Total estimated expense	161
Performance Shares [Member]
Remainder of 2021	1,292
2022	1,453
2023	711
2024	0
2025	0
2026	0
Total estimated expense	$ 3,456