Note 12 - Leases - Components of Lease Expense and Other Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Operating Lease Cost (leases with a total term greater than 12 months)	$ 674	$ 569	$ 1,812	$ 1,644
Short-term Lease Cost (leases with a total term of 12 months or less)	21	76	103	449
Variable Lease Cost	179	164	421	437
Total Lease Cost	874	809	2,336	2,530
Operating Lease - Operating Cash Flows (Fixed Payments)	2,929	571	4,040	1,560
Operating Lease - Operating Cash Flows (Liability Reduction)	590	475	1,538	1,273
New ROU Assets - Operating Leases	$ 4,188	$ 1,030	$ 6,751	$ 1,941
Weighted Average Discount Rate	3.18%		3.18%		3.87%
Weighted Average Remaining Lease Term (Year)	8 years 3 months 14 days		8 years 3 months 14 days		8 years 2 months 26 days