Table:
|  | December 31, 2018 |  |  |
| --- | --- | --- | --- |
|  | Cost | Accumulated amortization | Net book value |
|  | $ | $ | $ |
| Acquired technology | 15,556 | 7,875 | 7,681 |
| Software development costs | 24,963 | 9,226 | 15,737 |
| Acquired customer relationships | 495 | 346 | 149 |
| Purchased software | 6,973 | 4,503 | 2,470 |
| Other intangible assets | 591 | 556 | 35 |
|  | 48,578 | 22,506 | 26,072 |
Paragraphs:
Intangible Assets
Internal software development costs of $2,526 and $12,666 were capitalized during the years ended December 31, 2019 and 2018, respectively, and are classified within software development costs as an intangible asset. Amortization expense related to the capitalized internally developed software was $7,464 and $3,832 for the years ended December 31, 2019 and 2018, respectively, and is included in cost of revenues, sales and marketing and general and administrative expenses in the accompanying Consolidated Statements of Operations and Comprehensive Loss.
Expressed in US $000's except share and per share amounts
Question:
What is the cost of acquired technology as at December 31, 2018?
Answer: 15,556