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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Income Taxes [Textual] [Abstract]
Effective Income Tax Rate Reconciliation, Percent	(32.40%)	(21.30%)	(10.70%)	(8.10%)
Reserve for Uncertain Tax Positions	$ 1,444		$ 1,444	$ 1,570
Income Tax Examination, Penalties and Interest Expense	20		43
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	162
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 208		$ 208

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Income Taxes [Textual] [Abstract]

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Reserve for Uncertain Tax Positions

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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-Section S99
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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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