Stock Options and Warrants (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (shares)	8,000	50,000	50,000
Exercise price (usd per share)	$ 7,170.00	$ 4.95	$ 1.59
Total unrecognized compensation	$ 617
Vesting period for unrecognized compensation cost to be recognized	2 years
Proceeds from stock options exercised	2,770	1,013	1
Second Amended And Restated 2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)	3,500,000
Securities reserved for future issuance (shares)	2,534,000
Stock-based compensation expense	636	385	647
Total unrecognized compensation	$ 617
Vesting period for unrecognized compensation cost to be recognized	2 years

Securities, Capital Stock Reserved For Future Issuance

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Exercise Price

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Section F

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.29)

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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