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Termination Costs	12 Months Ended
	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Termination Costs	4. Termination Costs In September 2015, we reduced our workforce to decrease costs and better align our workforce with the needs of the business and oil and gas prices. In connection with the reduction, we incurred $1.4 million in expenses, which was recorded in termination costs on our consolidated statements of operations. As of December 31, 2017, there was no remaining liability related to termination costs on our consolidated balance sheets. We also recorded a benefit of $0.3 million in share-based compensation expense related to the forfeiture of unvested shares of restricted stock in connection with our workforce reduction, which was recorded in general and administrative expense on our consolidated statements of operations.

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- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-URI http://asc.fasb.org/topic&trid=2175745

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