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Inventories | 3 Months Ended
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Mar. 31, 2018
Inventories: |
Inventories | Note 3. Inventories The components of inventories are summarized below (in thousands):
|  | March 31, |  | December 31, |
|  | 2018 |  | 2017 |
Inventories: |  |  |  |  |  |  |
Raw materials |  | $ | 25,626 |  | $ | 23,554 |
Work in process |  |  | 23,805 |  |  | 20,135 |
Finished goods |  |  | 1,691 |  |  | 2,151 |
|  | $ | 51,122 |  | $ | 45,840 |
As of March 31, 2018 and December 31, 2017, carrying values of inventories were net of inventory reserves of $13.7 million and $13.3 million, respectively, for excess and obsolete inventory and $322,000 and $291,000, respectively, for lower of cost or net realizable value reserves.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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