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Segment Information and Major Customers | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Segment Information and Major Customers | 9. Segment Information and Major Customers The Company operates in one industry – oil and gas exploration, development, operation and servicing. The Company’s oil and gas activities are entirely in the United States. The Company sells its oil and gas production to a number of direct purchasers under direct contracts or through other operators under joint operating agreements. Listed below are the percent of the Company’s total oil and gas sales made which represented more than 10% of the Company’s oil and gas sales in the year 2017.
Oil Purchasers: |  |  |  |
Apache Corporation |  |  | 28 | %
Plains All American Inc. |  |  | 23 | %
Sunoco, Inc. |  |  | 16 | %
Shell Trading Company |  |  | 10 | %
Gas Purchasers: |  |  |  |
Targa Pipeline Mid-Continent |  |  | 25 | %
Apache Corporation |  |  | 12 | %
Although there are no long-term oil and gas purchasing agreements with these purchasers, the Company believes that they will continue to purchase its oil and gas products and, if not, could be replaced by other purchasers.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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