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Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Revenues | $ 16,969 | $ 17,569
Transferred at Point in Time [Member] |  |
Revenues | 13,869 | 15,010
Transferred over Time [Member] |  |
Revenues | 3,100 | 2,559
Connectivity Products [Member] |  |
Revenues | 12,251 | 13,319
Smart Sensing Products [Member] |  |
Revenues | 4,718 | 4,250
License [Member] |  |
Revenues | 11,011 | 10,083
License [Member] | Transferred at Point in Time [Member] |  |
Revenues | 7,911 | 7,524
License [Member] | Transferred over Time [Member] |  |
Revenues | 3,100 | 2,559
License [Member] | Connectivity Products [Member] |  |
Revenues | 6,631 | 6,358
License [Member] | Smart Sensing Products [Member] |  |
Revenues | 4,380 | 3,725
Royalty [Member] |  |
Revenues | 5,958 | 7,486
Royalty [Member] | Transferred at Point in Time [Member] |  |
Revenues | 5,958 | 7,486
Royalty [Member] | Transferred over Time [Member] |  |
Revenues |  |
Royalty [Member] | Connectivity Products [Member] |  |
Revenues | 5,620 | 6,961
Royalty [Member] | Smart Sensing Products [Member] |  |
Revenues | 338 | 525
UNITED STATES |  |
Revenues | 1,779 | 1,707
UNITED STATES | License [Member] |  |
Revenues | 1,493 | 1,360
UNITED STATES | Royalty [Member] |  |
Revenues | 286 | 347
Europe and Middle East [Member] |  |
Revenues | 3,342 | 2,453
Europe and Middle East [Member] | License [Member] |  |
Revenues | 1,382 | 1,338
Europe and Middle East [Member] | Royalty [Member] |  |
Revenues | 1,960 | 1,115
Asia Pacific [Member] |  |
Revenues | 11,848 | 13,409
Asia Pacific [Member] | License [Member] |  |
Revenues | 8,136 | 7,385
Asia Pacific [Member] | Royalty [Member] |  |
Revenues | $ 3,712 | $ 6,024

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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