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Note 3 - Schedule of Adoption of New Revenue Standard Impacted the Consolidated Financial Statements - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Contract assets	$ 33,490
Inventories, net	111,062		$ 138,542
Taxes payable	1,651		43
Retained earnings	538,463		$ 429,826
Accounting Standards Updated 2014-09 [Member] \| Effect of Change [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Contract assets	33,490
Inventories, net	(27,733)
Taxes payable	1,402
Retained earnings	5,119	$ 16,219
Accounting Standards Updated 2014-09 [Member] \| Amount Without Adoption of ASC 606 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Inventories, net	138,795
Taxes payable	249
Retained earnings	$ 533,344