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Stock-based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013
Stock options outstanding and exercisable
Outstanding number of Options	843,442
Outstanding Average Life	8 years 11 months 9 days
Outstanding Average Exercise Price	$ 3.76
Exercisable number of Options	194,550
Exercisable, Weighted Average Exercise Price	$ 11.14
$0.36-$1.33
Stock options outstanding and exercisable
Price Range, Minimum	$ 0.36
Price Range, Maximum	$ 1.33
Outstanding number of Options	1,433
Outstanding Average Life	8 years 6 months 22 days
Outstanding Average Exercise Price	$ 1.21
Exercisable number of Options	286
Exercisable, Weighted Average Exercise Price	$ 0.71
$1.38-$1.38
Stock options outstanding and exercisable
Price Range, Minimum	$ 1.38
Price Range, Maximum	$ 1.38
Outstanding number of Options	727,869
Outstanding Average Life	9 years 5 months 16 days
Outstanding Average Exercise Price	$ 1.38
Exercisable number of Options	98,233
Exercisable, Weighted Average Exercise Price	$ 1.38
$1.40-$22.98
Stock options outstanding and exercisable
Price Range, Minimum	$ 1.40
Price Range, Maximum	$ 22.98
Outstanding number of Options	96,465
Outstanding Average Life	5 years 10 months 6 days
Outstanding Average Exercise Price	$ 12.04
Exercisable number of Options	78,356
Exercisable, Weighted Average Exercise Price	$ 13.18
$22.98-$33.42
Stock options outstanding and exercisable
Price Range, Minimum	$ 22.98
Price Range, Maximum	$ 33.42
Outstanding number of Options	17,168
Outstanding Average Life	4 years 5 months 1 day
Outstanding Average Exercise Price	$ 32.78
Exercisable number of Options	17,168
Exercisable, Weighted Average Exercise Price	$ 32.78
$33.42-$440.40
Stock options outstanding and exercisable
Price Range, Minimum	$ 33.42
Price Range, Maximum	$ 440.40
Outstanding number of Options	250
Outstanding Average Life	3 months 26 days
Outstanding Average Exercise Price	$ 263.94
Exercisable number of Options	250
Exercisable, Weighted Average Exercise Price	$ 263.94
$440.40-$1908.00
Stock options outstanding and exercisable
Price Range, Minimum	$ 440.40
Price Range, Maximum	$ 1,908.00
Outstanding number of Options	257
Outstanding Average Life	3 months 18 days
Outstanding Average Exercise Price	$ 1,443.56
Exercisable number of Options	257
Exercisable, Weighted Average Exercise Price	$ 1,443.56

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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-Publisher FASB

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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