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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Income Taxes (Textual) [Abstract]
Unrecognized tax benefit	$ 303
Federal returns currently under examination	2004 through 2009
Recognized tax benefit	$ 0
No amount reserve for research and development tax credits	2004 through 2007

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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