Number of shares issued during the period as a result of the conversion of convertible warrant securities.

No definition available.

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- Definition

Warrant liability reclassified to additional paid in capital.

+ References

No definition available.

+ Details

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ 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)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ 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 (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Convertible Preferred Stock and Stock Warrants (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended
	Feb. 07, 2014	Jun. 14, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 07, 2014
Warrants and Rights Note Disclosure [Abstract]
Change in fair value of warrant liability			$ 0	$ 0	$ 2,649
Revalued warrant liability		14,000	0	0	13,973
Volatility rate		58.10%
Risk-free rate of return		0.36%
Assumed dividend rate		0.00%
Stock warrants exercised, shares	1,277,250		1,277,250	267,000	348,350
Exercise price of the exercisable warrants (in dollars per share)						$ 1.21
Cash proceeds from exercise of warrants	$ 1,500us-gaap_ProceedsFromWarrantExercises		$ 1,545us-gaap_ProceedsFromWarrantExercises	$ 323us-gaap_ProceedsFromWarrantExercises	$ 421us-gaap_ProceedsFromWarrantExercises