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Share-Based Payment (Details Textual) (USD $)
|
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
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| Share Based Payment (Textual) [Abstract] | ||||
| Payments for share-based plan | $ 200,000 | $ 500,000 | ||
| Change in accrual for share-based compensation expenses | 100,000 | 100,000 | ||
| Payments made under share based compensation | $ 0 | $ 0 | ||