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Fair Value Measurements (Narrative) (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Fair Value Measurements [Abstract] |  |  |  |
Non-cash gain on change in fair value of contingent obligation included in general and administrative expense | $ 369,000 |  | $ 589,000 |
Potential payout consideration | $ 1,500,000 |  |  |

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- Details
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- Definition The increase (decrease) during the reporting period in fair value of contingent promissory note. + References No definition available. + Details
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- Definition The amount of potential payout consideration based on the probability weighted discounted cash flow valuation technique. + References No definition available. + Details
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