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Restructuring (Details Textual) (USD $)	6 Months Ended	12 Months Ended
Restructuring (Details Textual) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Restructuring (Textual) [Abstract]
Reduction in workforce		28.00%
Restructuring charges included severance and related costs		$ 1,145,000

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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