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Fair Value Measurements (Cash and Cash Equivalents Investments, Measured at Fair Value on a Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale Securities, short term investment | $ 11,349 | $ 7,957 |
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Money Market Funds [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale Securities, short term investment | 11,349 | 7,957 |
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Fair Value, Inputs, Level 1 [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale Securities, short term investment | 11,349 | 7,957 |
|
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
|
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| Schedule of Available-for-sale Securities [Line Items] | ||
| Available-for-sale Securities, short term investment | $ 11,349 | $ 7,957 |