Income Tax (Narrative) (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Unrecognized income tax benefits	$ 0	$ 0
Income tax expense accrued	$ 0	$ 0

The amount of estimated interest accrued as of the balance sheet date arising from income tax examinations.

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

Name:	us-gaap_IncomeTaxExaminationInterestAccrued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant