Stock Option Plans and Warrants to Purchase Common Stock (Details 1) (Stock Options [Member], USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]
Summary of options/warrants activity
Beginning Balance	1,544,242	1,308,056
Granted	100,000	523,344
Exercised		(79,844)
Forfeited	(186,518)	(207,314)
Ending Balance	1,457,724	1,544,242
Beginning Balance, weighted average options/warrants exercise price	$ 3.75	$ 4.84
Granted, weighted average options/warrants exercise price	$ 0.30	$ 1.68
Exercised, weighted average options/warrants exercise price		$ 3.18
Forfeited, weighted average options exercise price	$ 6.22	$ 1.88
Ending Balance, weighted average options/warrants exercise price	$ 3.19	$ 3.75

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.

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-Name Accounting Standards Codification

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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 option holders acquired shares when converting their stock options into shares.

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

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