Net Loss Per Common Share (Narrative) (Details) - shares	Dec. 31, 2016	Jun. 20, 2016	Dec. 31, 2015	Aug. 03, 2015	Aug. 02, 2015
Remaining shares authorized for issuance	670,000,000		670,000,000	670,000,000	445,000,000
Common Stock Issuance Agreement [Member]
Remaining shares authorized for issuance	286,846	1,037,053

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

Name:	us-gaap_CommonStockSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant