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Inventories | 6 Months Ended
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Jun. 30, 2017
Inventory Disclosure [Abstract] |
Inventories | Inventories The major components of inventories were as follows:
| June 30, 2017 |  | December 31, 2016
Petroleum products | $ | 11,703 |  |  | $ | 11,550 |
Crude oil | 41,816 |  |  | 73,133 |
Caustic soda | 5,723 |  |  | 4,593 |
NaHS | 9,524 |  |  | 9,304 |
Other | 21 |  |  | 7 |
Total | $ | 68,787 |  |  | $ | 98,587 |
Inventories are valued at the lower of cost or net realizable value. The net realizable value of inventories were below recorded costs by approximately $0.1 million as of June 30, 2017 without similar adjustments required as of December 31, 2016; therefore we reduced the value of inventory in our Condensed Consolidated Financial Statements for this difference in 2017.

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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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