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Available-for-sale Securities | 12 Months Ended
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Dec. 31, 2013
Available-for-sale Securities | Note 5. Available-for-sale Securities The following is a summary of available-for-sale securities at December 31, 2013 (in thousands):
|  | December 31, 2013 |
|  | Carrying Value |  |  | Gross Unrealized Gain |  |  | Fair Value |
Money market funds |  | $ | 8,650 |  |  | $ | — |  |  | $ | 8,650 |
United States government agency securities |  |  | 5,019 |  |  |  | (1 | ) |  |  | 5,018 |
Corporate debt securities |  |  | 23,165 |  |  |  | 8 |  |  |  | 23,173 |
Total available-for-sale securities |  | $ | 36,834 |  |  | $ | 7 |  |  | $ | 36,841 |
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 |  |  | $ | — |  |  | $ | 10,268 |
Total available-for-sale securities |  | $ | 10,268 |  |  | $ | — |  |  | $ | 10,268 |
Available-for-sale securities at December 31, 2013 and 2012 consisted of the following by original contractual maturity (in thousands):
|  | December 31, 2013 |  |  | December 31, 2012 |
|  | Carrying Value |  |  | Fair Value |  |  | Carrying Value |  |  | Fair Value |
Due in one year or less |  | $ | 30,700 |  |  | $ | 30,701 |  |  | $ | 10,268 |  |  | $ | 10,268 |
Due greater than one year and less than five years |  |  | 6,134 |  |  |  | 6,140 |  |  |  | — |  |  |  | — |
Total available-for-sale securities |  | $ | 36,834 |  |  | $ | 36,841 |  |  | $ | 10,268 |  |  | $ | 10,268 |
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, 2013 and 2012. The Company recorded minimal gross realized losses from the sale of available-for-sale investments during the year ended December 31, 2013, 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, 2013, 2012 and 2011.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 + Details
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