Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset	$ 11,937
Operating Lease, Liability, Total	$ 12,450
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset		$ 12,500
Operating Lease, Liability, Total		$ 12,500