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Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Revenues $ 106,939 $ 97,419 $ 120,583
Transferred at Point in Time [Member]      
Revenues 97,595 86,406 107,442
Transferred over Time [Member]      
Revenues 9,344 11,013 13,141
Connectivity Products [Member]      
Revenues 90,033 79,697 94,202
Smart Sensing Products [Member]      
Revenues 16,906 17,722 26,381
License [Member]      
Revenues 59,999 57,555 75,194
License [Member] | Transferred at Point in Time [Member]      
Revenues 50,655 46,542 62,053
License [Member] | Transferred over Time [Member]      
Revenues 9,344 11,013 13,141
License [Member] | Connectivity Products [Member]      
Revenues 53,607 49,910 60,312
License [Member] | Smart Sensing Products [Member]      
Revenues 6,392 7,645 14,882
Royalty [Member]      
Revenues 46,940 39,864 45,389
Royalty [Member] | Transferred at Point in Time [Member]      
Revenues 46,940 39,864 45,389
Royalty [Member] | Transferred over Time [Member]      
Revenues 0 0 0
Royalty [Member] | Connectivity Products [Member]      
Revenues 36,426 29,787 33,890
Royalty [Member] | Smart Sensing Products [Member]      
Revenues 10,514 10,077 11,499
UNITED STATES      
Revenues 20,304 9,551 14,155
UNITED STATES | License [Member]      
Revenues 14,988 3,845 7,055
UNITED STATES | Royalty [Member]      
Revenues 5,316 5,706 7,100
Europe and Middle East [Member]      
Revenues 12,796 12,184 9,944
Europe and Middle East [Member] | License [Member]      
Revenues 8,486 9,197 6,739
Europe and Middle East [Member] | Royalty [Member]      
Revenues 4,310 2,987 3,205
Asia Pacific [Member]      
Revenues [1] 73,826 75,684 96,484
Asia Pacific [Member] | License [Member]      
Revenues 36,512 44,513 61,400
Asia Pacific [Member] | Royalty [Member]      
Revenues 37,314 31,171 35,084
Other [Member]      
Revenues 13 0 $ 0
Other [Member] | License [Member]      
Revenues 13 0  
Other [Member] | Royalty [Member]      
Revenues $ 0 $ 0  
[1] China