Note 13 - Leases (Details Textual)	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)
Operating Lease, Right-of-Use Asset	$ 2,501,000	$ 2,501,000
Operating Lease, Liability, Total	2,550,000	2,550,000
Finance Lease, Liability, Total	0	0
Operating Lease, Expense	$ 201,000	$ 603,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 354 days	3 years 354 days
Operating Lease, Weighted Average Discount Rate, Percent	4.28%	4.28%