Consolidated Statements of Shareholders' Equity (Parenthetical)		12 Months Ended
Mar. 31, 2014	Dec. 31, 2016
Statement Of Stockholders Equity [Abstract]
Reverse stock split, ratio	0.2	0.2

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Stock Split
-URI http://asc.fasb.org/extlink&oid=6525746

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration