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Note 4 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 32,790	$ 24,960	$ 88,649	$ 72,181
Transferred at Point in Time [Member]
Revenues	25,628	21,639	75,607	62,141
Transferred over Time [Member]
Revenues	7,162	3,321	13,042	10,040
Connectivity Products [Member]
Revenues	23,868	18,573	66,578	56,716
Smart Sensing Products [Member]
Revenues	8,922	6,387	22,071	15,465
License [Member]
Revenues	21,568	12,420	51,500	40,445
License [Member] \| Transferred at Point in Time [Member]
Revenues	14,406	9,099	38,458	30,405
License [Member] \| Transferred over Time [Member]
Revenues	7,162	3,321	13,042	10,040
License [Member] \| Connectivity Products [Member]
Revenues	16,368	8,821	38,886	31,679
License [Member] \| Smart Sensing Products [Member]
Revenues	5,200	3,599	12,614	8,766
Royalty [Member]
Revenues	11,222	12,540	37,149	31,736
Royalty [Member] \| Transferred at Point in Time [Member]
Revenues	11,222	12,540	37,149	31,736
Royalty [Member] \| Connectivity Products [Member]
Revenues	7,500	9,752	27,692	25,037
Royalty [Member] \| Smart Sensing Products [Member]
Revenues	3,722	2,788	9,457	6,699
UNITED STATES
Revenues	8,792	3,079	19,290	13,754
UNITED STATES \| License [Member]
Revenues	6,308	1,035	11,602	5,784
UNITED STATES \| Royalty [Member]
Revenues	2,484	2,044	7,688	7,970
Europe and Middle East [Member]
Revenues	1,430	825	3,435	10,017
Europe and Middle East [Member] \| License [Member]
Revenues	597	347	1,430	4,980
Europe and Middle East [Member] \| Royalty [Member]
Revenues	833	478	2,005	5,037
Asia Pacific [Member]
Revenues	22,558	21,056	65,914	48,410
Asia Pacific [Member] \| License [Member]
Revenues	14,653	11,038	38,458	29,681
Asia Pacific [Member] \| Royalty [Member]
Revenues	7,905	10,018	27,456	18,729
Other Geographic Regions [Member]
Revenues	10	$ 0	10	$ 0
Other Geographic Regions [Member] \| License [Member]
Revenues	$ 10		$ 10