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Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues	$ 24,960	$ 23,471	$ 72,181	$ 58,840
Transferred at Point in Time [Member]
Revenues	21,639	19,670	62,141	48,531
Transferred over Time [Member]
Revenues	3,321	3,801	10,040	10,309
Connectivity Products [Member]
Revenues	18,573	19,032	56,716	46,424
Smart Sensing Products [Member]
Revenues	6,387	4,439	15,465	12,416
License [Member]
Revenues	12,420	11,269	40,445	33,084
License [Member] \| Transferred at Point in Time [Member]
Revenues	9,099	7,468	30,405	22,775
License [Member] \| Transferred over Time [Member]
Revenues	3,321	3,801	10,040	10,309
License [Member] \| Connectivity Products [Member]
Revenues	8,821	8,608	31,679	23,324
License [Member] \| Smart Sensing Products [Member]
Revenues	3,599	2,661	8,766	9,760
Royalty [Member]
Revenues	12,540	12,202	31,736	25,756
Royalty [Member] \| Transferred at Point in Time [Member]
Revenues	12,540	12,202	31,736	25,756
Royalty [Member] \| Transferred over Time [Member]
Revenues	0	0	0	0
Royalty [Member] \| Connectivity Products [Member]
Revenues	9,752	10,424	25,037	23,100
Royalty [Member] \| Smart Sensing Products [Member]
Revenues	2,788	1,778	6,699	2,656
UNITED STATES
Revenues	3,079	3,811	13,754	7,713
UNITED STATES \| License [Member]
Revenues	1,035	3,450	5,784	6,809
UNITED STATES \| Royalty [Member]
Revenues	2,044	361	7,970	904
Europe and Middle East [Member]
Revenues	825	6,911	10,017	13,245
Europe and Middle East [Member] \| License [Member]
Revenues	347	1,241	4,980	2,848
Europe and Middle East [Member] \| Royalty [Member]
Revenues	478	5,670	5,037	10,397
Asia Pacific [Member]
Revenues	21,056	12,749	48,410	37,882
Asia Pacific [Member] \| License [Member]
Revenues	11,038	6,578	29,681	23,427
Asia Pacific [Member] \| Royalty [Member]
Revenues	$ 10,018	$ 6,171	$ 18,729	$ 14,455