Stock-Based Compensation (Details 1) (USD $)	3 Months Ended
Mar. 31, 2015
Stock Based Compensation [Line Items]
Number of Options Outstanding	2,436,834
Weighted Average Exercise Price Outstanding	$ 1.79
Number of Options Issued	590,500
Weighted Average Exercise Price Issued	$ 10.12
Number of Options Exercised	(7,666)
Weighted Average Exercise Price Exercised	$ 2.07ig_ExercisePricePerShareExercised1
Number of Options Forfeited	(10,500)
Weighted Average Exercise Price Forfeited	$ 3.06
Number of Options Expired	0
Weighted Average Exercise Price Expired	$ 0
Number of Options Outstanding	3,009,168
Weighted Average Exercise Price Outstanding	$ 3.42
Number of Options Exercisable as of March 31, 2015	1,736,997
Weighted Average Exercise Price Exercisable as of March 31, 2015 (in Dollars per share)	$ 1.20

Weighted average exercise price shares were exercised.

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Number of share options (or share units) expired during the current period.

+ References

No definition available.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ 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 weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ 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)(iv)(3)

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

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No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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