Interim Consolidated Statements of Comprehensive Loss (Parenthetical)			12 Months Ended
Sep. 04, 2018	Nov. 28, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reverse stock split	1:15 reverse stock split	one-to-nine Reverse Stock Split
September 4, 2018 [Member]
Reverse stock split			1:15 reverse Stock Split	1:15 reverse Stock Split	1:15 reverse Stock Split

Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration