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REVENUE RECOGNITION (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregated revenue | The following table presents the disaggregation of the Company's revenue for the years ended December 31, 2019, 2018 and 2017 (in thousands):
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017 (1)
Fixed fee license revenue | $ | 12,627 |  |  | $ | 83,573 |  |  | $ | 12,575 |
Per-Unit royalty revenue | 23,016 |  |  | 26,984 |  |  | 21,514 |
Total royalty and license revenue | 35,643 |  |  | 110,557 |  |  | 34,089 |
Development, services, and other | 310 |  |  | 422 |  |  | 924 |
Total revenues | $ | 35,953 |  |  | $ | 110,979 |  |  | $ | 35,013 |
(1) Revenues for the year ended December 31, 2017 are presented in accordance with ASC 605.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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