Stock Based Compensation (Details 1) (Warrants and Options [Member], USD $)	12 Months Ended
Dec. 31, 2012
Warrants and Options [Member]
Number of Warrants and Options, Outstanding, December 31, 2011	25,000
Number of Warrants and Options, Granted	0
Number of Warrants and Options, Exercised	(15,000)
Number of Warrants and Options, Cancelled	0
Number of Warrants and Options, Outstanding, December 31, 2012	10,000
Weighted Average Exercise Price, Outstanding, December 31, 2011	$ 4.08
Weighted-Average Exercise Price, Granted	$ 0
Weighted-Average Exercise Price, Exercised	$ 4.46
Weighted-Average Exercise Price, Cancelled	$ 0
Weighted Average Exercise Price, Outstanding, December 31, 2012	$ 5.40

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.

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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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including 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 that were terminated.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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

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

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