Note 1 - Basis of Presentation and Summary of Significant Accounting Policies - Cumulative Effect Adjustments to Retained Earnings (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Jun. 30, 2018
Net cumulative effect adjustments to Retained earnings on July 1, 2018 due to the adoption of new accounting standards		$ 98
Retained Earnings [Member]
Net cumulative effect adjustments to Retained earnings on July 1, 2018 due to the adoption of new accounting standards	$ 24,780	$ 24,780
Accounting Standards Update 2014-09 [Member] \| Retained Earnings [Member]
Net cumulative effect adjustments to Retained earnings on July 1, 2018 due to the adoption of new accounting standards	98
Accounting Standards Update 2016-01 [Member] \| Retained Earnings [Member]
Net cumulative effect adjustments to Retained earnings on July 1, 2018 due to the adoption of new accounting standards	27,053
Accounting Standards Update 2018-02 [Member] \| Retained Earnings [Member]
Net cumulative effect adjustments to Retained earnings on July 1, 2018 due to the adoption of new accounting standards	$ (2,371)