Note 3 - Summary of Significant Accounting and Reporting Policies (Details Textual) - USD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash, Uninsured Amount		$ 8,600
Deferred Tax Assets, Gross, Total		$ 164,021	$ 164,680
Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member]
Operating Lease, Right-of-Use Asset	$ 200
Operating Lease, Liability, Total	$ 200