Note 13 - New Accounting Pronouncements (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Leases, Income Statement, Lease Revenue, Total	$ 1,719,000	$ 1,558,000	$ 3,396,000	$ 3,053,000
Operating Lease, Expense			17,000
Lessee, Operating Lease, Liability, Payments, Due, Total	$ 40,000		$ 40,000