Note 13 - New Accounting Pronouncements (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Leases, Income Statement, Lease Revenue, Total	$ 1,677,000	$ 1,495,000
Operating Lease, Expense	7,000
Lessee, Operating Lease, Liability, Payments, Due, Total	$ 50,000