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Stockholders' Equity (Recognized Contractor and Employee Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Recognized Employee Expense [Line Items]
Stock or Unit Option Plan Expense	$ 1,117	$ 50	$ 1,961	$ 161
Employee Stock Option [Member]
Recognized Employee Expense [Line Items]
Stock or Unit Option Plan Expense	907	41	1,409	152
Contractor Option [Member]
Recognized Employee Expense [Line Items]
Stock or Unit Option Plan Expense	$ 210	$ 9	$ 552	$ 9

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- References

No definition available.

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- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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