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Note 3 - Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2021
Notes Tables |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] |
|  | Remainder of 2021 |  |  | 2022 |
License and related revenues |  | $ | 5,131 |  |  | $ | 761 |
Disaggregation of Revenue [Table Text Block] |
|  | Three months ended March 31, 2021 (unaudited) |  |  | Three months ended March 31, 2020 (unaudited) |
|  | Licensing and related revenues |  |  | Royalties |  |  | Total |  |  | Licensing and related revenues |  |  | Royalties |  |  | Total |
Primary geographical markets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 572 |  |  | $ | 3,378 |  |  | $ | 3,950 |  |  | $ | 2,782 |  |  | $ | 513 |  |  | $ | 3,295 |
Europe and Middle East |  |  | 423 |  |  |  | 676 |  |  |  | 1,099 |  |  |  | 1,059 |  |  |  | 4,044 |  |  |  | 5,103 |
Asia Pacific |  |  | 13,402 |  |  |  | 6,951 |  |  |  | 20,353 |  |  |  | 10,654 |  |  |  | 4,563 |  |  |  | 15,217 |
Total |  | $ | 14,397 |  |  | $ | 11,005 |  |  | $ | 25,402 |  |  | $ | 14,495 |  |  | $ | 9,120 |  |  | $ | 23,615 |
Major product/service lines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Connectivity products (baseband for handset and other devices, Bluetooth, Wi-Fi, NB-IoT and SATA/SAS) |  | $ | 12,805 |  |  | $ | 8,105 |  |  | $ | 20,910 |  |  | $ | 10,927 |  |  | $ | 7,042 |  |  | $ | 17,969 |
Smart sensing products (AI, sensor fusion, audio/sound and imaging and vision) |  |  | 1,592 |  |  |  | 2,900 |  |  |  | 4,492 |  |  |  | 3,568 |  |  |  | 2,078 |  |  |  | 5,646 |
Total |  | $ | 14,397 |  |  | $ | 11,005 |  |  | $ | 25,402 |  |  | $ | 14,495 |  |  | $ | 9,120 |  |  | $ | 23,615 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products transferred at a point in time |  | $ | 11,988 |  |  | $ | 11,005 |  |  | $ | 22,993 |  |  | $ | 11,038 |  |  | $ | 9,120 |  |  | $ | 20,158 |
Products and services transferred over time |  |  | 2,409 |  |  |  | — |  |  |  | 2,409 |  |  |  | 3,457 |  |  |  | — |  |  |  | 3,457 |
Total |  | $ | 14,397 |  |  | $ | 11,005 |  |  | $ | 25,402 |  |  | $ | 14,495 |  |  | $ | 9,120 |  |  | $ | 23,615 |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | March 31, 2021 (unaudited) |  |  | December 31, 2020 |
Trade receivables |  | $ | 13,802 |  |  | $ | 14,765 |
Unbilled receivables (associated with licensing and related revenue) |  |  | 1,332 |  |  |  | 5,479 |
Unbilled receivables (associated with royalties) |  |  | 9,497 |  |  |  | 10,980 |
Deferred revenues (short-term contract liabilities) |  |  | 3,394 |  |  |  | 2,434 |

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