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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
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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) |

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