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Note 1 - Summary of Significant Accounting Policies - Impact of New Standard on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2018
--- | --- | --- | ---
Contract assets |  | $ 47,359 | $ 49,236 |
Inventory | [1] | 65,753 | 67,301 |
Accounts payable |  | 24,802 | 24,685 |
Other current liabilites |  | 15,703 | 14,767 |
Deferred tax liability |  | 7,365 | $ 8,475 |
Accounting Standards Update 2014-09 [Member] |  |  |  |
Inventory |  |  |  | $ (24,900)
Other current liabilites |  |  |  | $ 1,100
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |
Contract assets |  |  |  |
Inventory |  | 93,512 |  |
Accounts payable |  | 22,008 |  |
Other current liabilites |  | 12,811 |  |
Deferred tax liability |  | 5,441 |  |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |
Contract assets |  | 47,359 |  |
Inventory |  | (27,759) |  |
Accounts payable |  | 2,794 |  |
Other current liabilites |  | 2,892 |  |
Deferred tax liability |  | $ 1,924 |  |
[1] | Inventories consist of the following: March 31, 2019 December 31, (Unaudited) 2018 Finished goods $ 56,552 $ 58,196 Work in process 527 650 Raw materials 8,674 8,455 $ 65,753 $ 67,301

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