For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Commitments and Contingencies (Details) $ in Thousands	Jun. 30, 2016 USD ($) lawsuit	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) lawsuit	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Legal Matters
Number of active lawsuits filed by entity \| lawsuit	1		1
Revenues	$ 26,488	$ 18,283	$ 53,376	$ 34,771
Texas \| Geographic Concentration Risk \| Sales
Legal Matters
Revenues			$ 7,600		$ 12,600
Concentration risk (as a percent)			14.00%		16.00%