v3.10.0.1

Goodwill and intangible assets | 12 Months Ended
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Dec. 31, 2018
Goodwill and intangible assets |
Goodwill and intangible assets | 8. Goodwill and intangible assets Goodwill The following table sets forth the changes in our goodwill balance, for all periods presented:
|  | Goodwill
Balance, December 31, 2016 and December 31, 2017 |  | $ | 42,403
Acquisition of Elauwit |  |  | 17,237
Balance, December 31, 2018 |  | $ | 59,640
Intangible assets The following table sets forth the changes in our intangible assets balance, for all periods presented:
|  | Intangible
|  | Assets
Balance, December 31, 2016 |  | $ | 13,783
Amortization expense |  |  | (3,520)
Balance, December 31, 2017 |  |  | 10,263
Additions |  |  | 12,640
Amortization expense |  |  | (3,751)
Balance, December 31, 2018 |  | $ | 19,152
Intangible assets at December 31, 2018 consist of the following:
|  | Historical |  | Accumulated |  |  |
|  | Cost |  | Amortization |  | Net
Venue contracts |  | $ | 20,530 |  | $ | (13,829) |  | $ | 6,701
Backlog |  |  | 7,030 |  |  | (586) |  |  | 6,444
Customer and partner relationships |  |  | 3,780 |  |  | (206) |  |  | 3,574
Non-compete agreements, technology and other |  |  | 5,084 |  |  | (2,651) |  |  | 2,433
|  | $ | 36,424 |  | $ | (17,272) |  | $ | 19,152
Intangible assets at December 31, 2017 consist of the following:
|  | Historical |  | Accumulated |  |  |
|  | Cost |  | Amortization |  | Net
Venue contracts |  | $ | 22,061 |  | $ | (13,835) |  | $ | 8,226
Non-compete agreements, technology and other |  |  | 6,844 |  |  | (4,807) |  |  | 2,037
|  | $ | 28,905 |  | $ | (18,642) |  | $ | 10,263
The decrease in our intangible assets cost and accumulated amortization balances from 2017 to 2018 is primarily related to the write-off of venue contract intangible assets that have expired. Amortization expense for fiscal years 2019 through 2023 and thereafter is as follows:
|  | Amortization
Year |  | Expense
2019 |  | $ | 4,435
2020 |  |  | 4,221
2021 |  |  | 3,494
2022 |  |  | 3,030
2023 |  |  | 1,863
Thereafter |  |  | 2,109
|  | $ | 19,152

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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