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Subsequent Event (Details) (Subsequent Event [Member], USD $)	1 Months Ended
	Apr. 30, 2013
Subsequent Event [Member]
Subsequent Event (Textual) [Abstract]
Tax receivable	$ 750,000
Income tax additional credit Research and development	$ 0

Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

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