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Note 1 - Summary of Significant Interim Accounting Policies - Impact of New Standard on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Contract assets |  | $ 49,605 | $ 43,300 |
Inventory | [1] | 65,057 |  | 64,979
Deferred taxes |  | (8,525) |  |
Accounts payable |  | 25,024 |  | 19,752
Other current liabilites |  | 14,804 |  | $ 12,409
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |
Contract assets |  |  |  |
Inventory |  | 93,770 |  |
Deferred taxes |  | (5,639) |  |
Accounts payable |  | 22,239 |  |
Other current liabilites |  | 12,730 |  |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |
Contract assets |  | 49,605 |  |
Inventory |  | (28,713) |  |
Deferred taxes |  | (2,886) |  |
Accounts payable |  | 2,785 |  |
Other current liabilites |  | $ 2,074 |  |
[1] | Inventories consist of the following: September 30, 2018 December 31, (Unaudited) 2017 Finished goods $ 54,702 $ 54,354 Work in process 868 604 Raw materials 9,487 10,021 $ 65,057 $ 64,979

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