Note 3 - New Accounting Standards (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset	$ 2,134		$ 2,600
Operating Lease, Liability, Total	2,313		$ 2,800
Finance Lease, Principal Payments	$ 30