Note 8 - Leases (Details Textual)	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Short-term Lease, Cost	$ 34,000	$ 102,000
Variable Lease, Payment	$ 200,000	$ 600,000
Operating Lease, Weighted Average Discount Rate, Percent	3.80%	3.80%
Professional Services [Member]
Short-term Lease, Cost	$ 34,000	$ 102,000
Minimum [Member]
Lessee, Operating Lease, Term of Contract	5 months	5 months
Maximum [Member]
Lessee, Operating Lease, Term of Contract	13 years	13 years
Branches and Office Space [Member]
Number of Leases	20	20
Vehicles [Member]
Number of Leases	9	9
Equipment [Member]
Number of Leases	1	1