Note 5 - Leases - Lease Term and Discount Rate (Details)	Jun. 30, 2022	Dec. 31, 2021
Weighted average discount rate - operating leases	3.80%	3.80%
Weighted average discount rate - finance leases	6.10%	6.10%
Weighted average remaining lease term in years - operating leases (Year)	7 years 6 months	7 years 9 months 18 days
Weighted average remaining lease term in years - finance leases (Year)	2 years 6 months	3 years