v3.6.0.2

Intangible assets | 12 Months Ended
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Dec. 31, 2016
Intangible assets |
Intangible assets | 7. Intangible assets The following table sets forth the changes in our intangible assets balance, for all periods presented:
|  | Intangible Assets |
Balance, December 31, 2014 |  | $ | 19,676 |
Amortization expense |  |  | (3,594 | )
Impairment loss |  |  | (27 | )
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Balance, December 31, 2015 |  |  | 16,055 |
Additions |  |  | 1,210 |
Amortization expense |  |  | (3,470 | )
Impairment loss |  |  | (12 | )
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Balance, December 31, 2016 |  | $ | 13,783 |
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In November 2016, we acquired a caching technology intangible asset for $1,250 which was valued at the date of acquisition based on Level 3 inputs. $1,150 of the purchase price was paid in January 2017. The identifiable intangible asset was valued at fair value at $1,210 using the cost savings and replacement cost methods using a discount rate of 20%. The remaining purchase price was expensed as it related to the settlement of a pre-existing contractual relationship. The caching technology has an estimated useful life of 4 years. During 2016 and 2014, we recorded impairment losses for certain patent applications that we abandoned. During 2015, we recorded impairment losses for the termination of a contract and certain patent applications that we abandoned. Intangible assets at December 31, 2016 consist of the following:
|  | Historical Cost |  | Accumulated Amortization |  | Net |
Venue contracts |  | $ | 23,601 |  | $ | (13,276 | ) | $ | 10,325 |
Non-compete agreements |  |  | 3,590 |  |  | (2,274 | ) |  | 1,316 |
Technology |  |  | 3,520 |  |  | (1,742 | ) |  | 1,778 |
Advertiser relationships |  |  | 70 |  |  | (62 | ) |  | 8 |
Patents, trademarks and other |  |  | 1,034 |  |  | (678 | ) |  | 356 |
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|  | $ | 31,815 |  | $ | (18,032 | ) | $ | 13,783 |
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Intangible assets at December 31, 2015 consist of the following:
|  | Historical Cost |  | Accumulated Amortization |  | Net |
Venue contracts |  | $ | 23,630 |  | $ | (11,104 | ) | $ | 12,526 |
Non-compete agreements |  |  | 3,590 |  |  | (1,556 | ) |  | 2,034 |
Technology |  |  | 2,310 |  |  | (1,295 | ) |  | 1,015 |
Advertiser relationships |  |  | 70 |  |  | (48 | ) |  | 22 |
Patents, trademarks and other |  |  | 1,034 |  |  | (576 | ) |  | 458 |
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|  | $ | 30,634 |  | $ | (14,579 | ) | $ | 16,055 |
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The decrease in our intangible assets cost and accumulated amortization balances from 2015 to 2016 related to the write-off of intangible assets that were impaired as well as intangible assets that have expired. Amortization expense for fiscal years 2017 through 2021 and thereafter is as follows:
Year |  | Amortization Expense |
2017 |  | $ | 3,517 |
2018 |  |  | 2,674 |
2019 |  |  | 1,937 |
2020 |  |  | 1,832 |
2021 |  |  | 1,455 |
Thereafter |  |  | 2,368 |
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|  | $ | 13,783 |
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