Note 13 - Leases - Lease Term and Discount Rate (Details)	Mar. 31, 2021	Dec. 31, 2020
Weighted average discount rate - operating leases	3.80%	3.30%
Weighted average discount rate - finance leases	5.70%	5.70%
Weighted average remaining lease term - operating leases (Year)	8 years 8 months 12 days	1 year 6 months
Weighted average remaining lease term - finance leases (Year)	3 years 7 months 6 days	10 months 24 days