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GOODWILL AND INTANGIBLE ASSETS, NET (Tables) | 12 Months Ended
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Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Changes in Goodwill | Changes in goodwill are as follows:
|  | 2014 |  |  | 2015 |
Balance as of January 1, |  | $ | 36,498 |  |  | $ | 46,612 |
Acquisition |  |  | 10,114 |  |  |  | — |
Balance as of December 31, |  | $ | 46,612 |  |  | $ | 46,612 |
Summary of Intangible Assets | (b) Intangible assets:
|  |  |  | Year ended December 31, 2014 |  |  | Year ended December 31, 2015 |
|  | Weighted Average Amortization Period (Years) |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Intangible assets—amortizable: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | 4.5 |  |  | 272 |  |  |  | 30 |  |  |  | 242 |  |  |  | 272 |  |  |  | 91 |  |  |  | 181 |
Customer backlog |  | 1.5 |  |  | 93 |  |  |  | 31 |  |  |  | 62 |  |  |  | 93 |  |  |  | 93 |  |  |  | — |
Core technologies |  | 5.1 |  |  | 5,796 |  |  |  | 588 |  |  |  | 5,208 |  |  |  | 5,796 |  |  |  | 1,763 |  |  |  | 4,033 |
Total intangible assets |  |  |  | $ | 6,161 |  |  | $ | 649 |  |  | $ | 5,512 |  |  | $ | 6,161 |  |  | $ | 1,947 |  |  | $ | 4,214 |
Summary of Future Estimated Annual Amortization Charges | Future estimated annual amortization charges are as follows:
2016 |  | $ | 1,236 |
2017 |  |  | 1,236 |
2018 |  |  | 901 |
2019 |  |  | 841 |
|  | $ | 4,214 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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