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Available-for-sale Securities (Tables) | 9 Months Ended
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Sep. 30, 2013
Summary of Available for Sale Securities | The following is a summary of available-for-sale securities at September 30, 2013 (in thousands):
|  | September 30, 2013 |
|  | Amortized Cost |  |  | Gross Unrealized Loss |  |  | Fair Value |
Money market funds |  | $ | 7,862 |  |  |  |  |  |  | $ | 7,862 |
United States government agency securities |  |  | 4,027 |  |  |  | (4 | ) |  |  | 4,023 |
Corporate debt securities |  |  | 24,977 |  |  |  | (29 | ) |  |  | 24,948 |
Total available-for-sale securities |  | $ | 36,866 |  |  | $ | (33 | ) |  | $ | 36,833 |
Available for Sale Securities by Original Contractual Maturity | Available-for-sale securities at September 30, 2013 and December 31, 2012, consisted of the following by original contractual maturity (in thousands):
|  | September 30, 2013 |  |  | December 31, 2012 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 24,509 |  |  | $ | 24,492 |  |  | $ | 10,268 |  |  | $ | 10,268 |
Due greater than one year and less than five years |  |  | 12,357 |  |  |  | 12,341 |  |  |  | — |  |  |  | — |
Total available-for-sale securities |  | $ | 36,866 |  |  | $ | 36,833 |  |  | $ | 10,268 |  |  | $ | 10,268 |

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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