Fair Value Measurements (Details) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Liabilities [Abstract]
Warrant liability	$ 0	$ 9,793,000
Fair Value, Measurements, Recurring [Member]
Assets [Abstract]
Cash equivalents		8,144,000
Liabilities [Abstract]
Warrant liability		9,793,000
Fair Value, Measurements, Recurring [Member] \| Level 1 [Member]
Assets [Abstract]
Cash equivalents		8,144,000
Liabilities [Abstract]
Warrant liability		0
Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Assets [Abstract]
Cash equivalents		0
Liabilities [Abstract]
Warrant liability		0
Fair Value, Measurements, Recurring [Member] \| Level 3 [Member]
Assets [Abstract]
Cash equivalents		0
Liabilities [Abstract]
Warrant liability		9,793,000
Fair Value, Measurements, Recurring [Member] \| Level 3 [Member] \| Warrants [Member]
Change in Level 3 liability [Roll Forward]
Beginning balance	9,793,000	0
Additions to warrant liability	15,979,000	10,162,000
Exercised warrants	(18,104,000)	0
Change in fair value	(7,668,000)	(369,000)
Ending balance	$ 0	$ 9,793,000

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of transfers of financial instrument classified in shareholders' equity into (out of) level 3 of the fair value hierarchy.

+ References

No definition available.

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- Definition

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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