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Note 5 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenues $ 24,073 $ 30,050 $ 73,257 $ 90,233
Transferred at Point in Time [Member]        
Revenues 21,612 26,387 64,022 80,233
Transferred over Time [Member]        
Revenues 2,461 3,663 9,235 10,000
Connectivity Products [Member]        
Revenues 20,758 20,763 60,855 70,530
Smart Sensing Products [Member]        
Revenues 3,315 9,287 12,402 19,703
License [Member]        
Revenues 13,940 18,658 45,739 55,771
License [Member] | Transferred at Point in Time [Member]        
Revenues 11,479 14,995 36,504 45,771
License [Member] | Transferred over Time [Member]        
Revenues 2,461 3,663 9,235 10,000
License [Member] | Connectivity Products [Member]        
Revenues 13,110 12,443 40,762 44,948
License [Member] | Smart Sensing Products [Member]        
Revenues 830 6,215 4,977 10,823
Royalty [Member]        
Revenues 10,133 11,392 27,518 34,462
Royalty [Member] | Transferred at Point in Time [Member]        
Revenues 10,133 11,392 27,518 34,462
Royalty [Member] | Connectivity Products [Member]        
Revenues 7,648 8,320 20,093 25,582
Royalty [Member] | Smart Sensing Products [Member]        
Revenues 2,485 3,072 7,425 8,880
UNITED STATES        
Revenues 1,568 5,622 5,668 12,051
UNITED STATES | License [Member]        
Revenues 360 4,061 1,399 6,390
UNITED STATES | Royalty [Member]        
Revenues 1,208 1,561 4,269 5,661
Europe and Middle East [Member]        
Revenues 5,624 2,608 10,518 6,387
Europe and Middle East [Member] | License [Member]        
Revenues 4,796 1,721 8,378 4,160
Europe and Middle East [Member] | Royalty [Member]        
Revenues 828 887 2,140 2,227
Asia Pacific [Member]        
Revenues [1] 16,862 21,820 56,551 71,795
Asia Pacific [Member] | License [Member]        
Revenues 8,765 12,876 35,442 45,221
Asia Pacific [Member] | Royalty [Member]        
Revenues 8,097 8,944 21,109 26,574
Other [Member]        
Revenues 19 $ 0 520 $ 0
Other [Member] | License [Member]        
Revenues 19   520  
Other [Member] | Royalty [Member]        
Revenues $ 0   $ 0  
[1] China