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Inventories | 12 Months Ended
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Dec. 31, 2017
Inventory Disclosure [Abstract] |
Inventories |
5. | Inventories
Inventories consisted of the following:
(Table only in thousands) |  | 2017 |  |  | 2016 |
Raw materials |  | $ | 18,444 |  |  | $ | 17,889 |
Work in process |  |  | 3,182 |  |  |  | 3,986 |
Finished goods |  |  | 940 |  |  |  | 1,508 |
Obsolescence allowance |  |  | (1,597 | ) |  |  | (1,896 | )
Total inventories |  | $ | 20,969 |  |  | $ | 21,487 |
Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $(0.2) million, $(1.2) million and $(0.7) million during 2017, 2016 and 2015, respectively. Items charged to the allowance for inventory write-offs were $0.6 million, $0.2 million and $0.2 million, during 2017, 2016 and 2015, respectively.

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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 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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