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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Schedule of disaggregation of revenue | The following table presents the disaggregation of our revenue for the three and nine months ended September 30, 2019 and 2018 (in thousands):
| Three months ended September 30, |  |  |  |
| 2019 |  | 2018 |  | Increase/(Decrease)
Variable patent royalty revenue | $ | 4,683 |  |  | $ | 13,645 |  |  | $ | (8,962 | ) |  | (66 | )%
Fixed-fee royalty revenue | 63,736 |  |  | 60,272 |  |  | 3,464 |  |  | 6 | %
Current patent royalties a | 68,419 |  |  | 73,917 |  |  | (5,498 | ) |  | (7 | )%
Non-current patent royalties b | (370 | ) |  | 128 |  |  | (498 | ) |  | (389 | )%
Total patent royalties | 68,049 |  |  | 74,045 |  |  | (5,996 | ) |  | (8 | )%
Current technology solutions revenue a | 3,724 |  |  | 1,034 |  |  | 2,690 |  |  | 260 | %
Patent sales b | 750 |  |  | — |  |  | 750 |  |  | — | %
Total revenue | $ | 72,523 |  |  | $ | 75,079 |  |  | $ | (2,556 | ) |  | (3 | )%
| Nine months ended September 30, |  |  |  |
| 2019 |  | 2018 |  | Increase/(Decrease)
Variable patent royalty revenue | $ | 22,557 |  |  | $ | 26,322 |  |  | $ | (3,765 | ) |  | (14 | )%
Fixed-fee royalty revenue | 190,345 |  |  | 178,207 |  |  | 12,138 |  |  | 7 | %
Current patent royalties a | 212,902 |  |  | 204,529 |  |  | 8,373 |  |  | 4 | %
Non-current patent royalties b | (4,908 | ) |  | 25,489 |  |  | (30,397 | ) |  | (119 | )%
Total patent royalties | 207,994 |  |  | 230,018 |  |  | (22,024 | ) |  | (10 | )%
Current technology solutions revenue a | 7,794 |  |  | 2,060 |  |  | 5,734 |  |  | 278 | %
Patent sales b | 975 |  |  | — |  |  | 975 |  |  | — | %
Total revenue | $ | 216,763 |  |  | $ | 232,078 |  |  | $ | (15,315 | ) |  | (7 | )%
a. | Recurring revenues are comprised of current patent royalties, inclusive of Dynamic Fixed-Fee Agreement royalties, and current technology solutions revenue.
b. Non-recurring revenues are comprised of non-current patent royalties, which primarily include past patent royalties and royalties from static agreements, as well as patent sales.
Schedule of contracted revenue | Based on contracts signed and committed as of September 30, 2019, we expect to recognize the following revenue from Dynamic Fixed-Fee Agreement payments over the term of such contracts (in thousands):
| Revenue
Remainder 2019 | $ | 63,736 |
2020 | 248,250 |
2021 | 178,583 |
2022 | 85,228 |
2023 | — |

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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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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045 + Details
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