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Available-for-sale Securities | 12 Months Ended
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Dec. 31, 2012
Available-for-sale Securities | Note 5. Available-for-sale Securities The following is a summary of available-for-sale securities at December 31, 2012 (in thousands):
|  | December 31, 2012 |
|  | Carrying Value |  |  | Gross Unrealized Gain |  |  | Fair Value |
Money market funds |  | $ | 10,268 |  |  | $ | 0 |  |  | $ | 10,268 |
Total available-for-sale securities |  | $ | 10,268 |  |  | $ | 0 |  |  | $ | 10,268 |
The following is a summary of available-for-sale securities at December 31, 2011 (in thousands):
|  | December 31, 2011 |
|  | Carrying Value |  |  | Gross Unrealized Gain |  |  | Fair Value |
Money market funds |  | $ | 8,683 |  |  | $ | 0 |  |  | $ | 8,683 |
United States government agency securities |  |  | 287 |  |  |  | 0 |  |  |  | 287 |
Total available-for-sale securities |  | $ | 8,970 |  |  | $ | 0 |  |  | $ | 8,970 |
Available-for-sale securities at December 31, 2012 and 2011 consisted of the following by original contractual maturity (in thousands):
|  | December 31, 2012 |  |  | December 31, 2011 |
|  | Carrying Value |  |  | Fair Value |  |  | Carrying Value |  |  | Fair Value |
Due in one year or less |  | $ | 10,268 |  |  | $ | 10,268 |  |  | $ | 8,683 |  |  | $ | 8,683 |
Due greater than three years and less than five years |  |  | 0 |  |  |  | 0 |  |  |  | 287 |  |  |  | 287 |
Total available-for-sale securities |  | $ | 10,268 |  |  | $ | 10,268 |  |  | $ | 8,970 |  |  | $ | 8,970 |
The maturities of certain short-term investments were estimated primarily based upon assumed prepayment features and credit enhancement characteristics. The Company recorded minimal gross realized gains from the sale or maturity of available-for-sale investments during the year ended December 31, 2011 and did not record any gross realized gains from the sale or maturity of available-for-sale investments during the years ended December 31, 2012 and 2010. The Company recorded minimal gross realized losses from the sale or maturity of available-for-sale investments during the year ended December 31, 2010 and did not record any gross realized losses during the years ended December 31, 2012 and 2011. The Company did not record losses on investments experiencing an other-than-temporary decline in fair value during the years ended December 31, 2012, 2011 and 2010.

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- Definition Available-for-sale securities. + References No definition available. + Details
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