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Intangibles and Other Assets | 12 Months Ended
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Dec. 31, 2014
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Intangibles and Other Assets | 5. Intangibles and Other Assets
|  | December 31, |
|  | 2014 |  |  | 2013 |
|  | (In thousands) |
Purchased patents and other purchased intangible assets |  | $ | 4,605 |  |  | $ | 5,731 |
Other assets |  |  | 265 |  |  |  | 289 |
Gross intangibles and other assets |  |  | 4,870 |  |  |  | 6,020 |
Accumulated amortization of purchased patents and other purchased intangibles |  |  | (4,579 | ) |  |  | (5,639 | )
Intangibles and other assets, net |  | $ | 291 |  |  | $ | 381 |
The Company amortizes its intangible assets related to purchased patents over their estimated useful lives, generally 10 years from the purchase date. Amortization of intangibles was as follows:
|  | Year ended December 31, |
|  | 2014 |  |  | 2013 |  |  | 2012 |
|  | (In thousands) |
Amortization of Intangibles |  | $ | 67 |  |  | $ | 79 |  |  | $ | 49 |
The table below includes estimated remaining annual amortization expense for purchased patents as of December 31, 2014.
|  | Estimated Amortization Expense |
|  | (In thousands) |
2015 |  | $ | 20 |
2016 |  |  | 6 |
Total |  | $ | 26 |

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