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Marketable Securities | 12 Months Ended
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Dec. 31, 2015
Investments Debt And Equity Securities [Abstract] |
Marketable Securities | NOTE 3 – MARKETABLE SECURITIES The table below summarizes the Company’s cash equivalents and available-for-sale securities (in thousands):
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Estimated |
|  | Cost |  |  | Gains |  |  | (Losses) |  |  | Fair Value |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 25,070 |  |  | $ | — |  |  | $ | — |  |  | $ | 25,070 |
Commercial paper securities |  |  | 2,000 |  |  |  | — |  |  |  | — |  |  |  | 2,000 |
U.S. government sponsored entity debt securities |  |  | 38,866 |  |  |  | 1 |  |  |  | — |  |  |  | 38,867 |
Total |  |  | 65,936 |  |  |  | 1 |  |  |  | — |  |  |  | 65,937 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper securities |  | $ | 30,667 |  |  | $ | 50 |  |  | $ | — |  |  | $ | 30,717 |
Corporate debt securities |  |  | 17,275 |  |  |  | — |  |  |  | (12 | ) |  |  | 17,263 |
U.S. government sponsored entity debt securities |  |  | 91,562 |  |  |  | — |  |  |  | (24 | ) |  |  | 91,538 |
Total |  |  | 139,504 |  |  |  | 50 |  |  |  | (36 | ) |  |  | 139,518 |
Total cash equivalents and available-for-sale securities |  | $ | 205,440 |  |  | $ | 51 |  |  | $ | (36 | ) |  | $ | 205,455 |
December 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 3,182 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,182 |
Total |  |  | 3,182 |  |  |  | — |  |  |  | — |  |  |  | 3,182 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper securities |  | $ | 33,715 |  |  | $ | 33 |  |  | $ | — |  |  | $ | 33,748 |
Corporate debt securities |  |  | 22,831 |  |  |  | — |  |  |  | (18 | ) |  |  | 22,813 |
U.S. government sponsored entity debt securities |  |  | 163,671 |  |  |  | — |  |  |  | (40 | ) |  |  | 163,631 |
Total |  |  | 220,217 |  |  |  | 33 |  |  |  | (58 | ) |  |  | 220,192 |
Total cash equivalents and available-for-sale securities |  | $ | 223,399 |  |  | $ | 33 |  |  | $ | (58 | ) |  | $ | 223,374 |
As of December 31, 2015, all of the Company’s investments had maturity dates within two years. All of the Company’s available-for-sale securities mature within the next twelve months of the date of the balance sheet. The Company had no material realized losses or other-than-temporary impairments of available-for-sale securities for the years ended December 31, 2015, 2014 and 2013. Sangamo has the intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in the market value. No investments were other-than-temporarily impaired.

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