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Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 122,706	$ 100,326	$ 87,152
Transferred at Point in Time [Member]
Revenues	103,280	87,888	73,056
Transferred over Time [Member]
Revenues	19,426	12,438	14,096
Connectivity Products [Member]
Revenues	89,420	78,665	70,677
Smart Sensing Products [Member]
Revenues	33,286	21,661	16,475
License [Member]
Revenues	72,827	52,513	47,890
License [Member] \| Transferred at Point in Time [Member]
Revenues	53,401	40,075	33,794
License [Member] \| Transferred over Time [Member]
Revenues	19,426	12,438	14,096
License [Member] \| Connectivity Products [Member]
Revenues	52,460	40,748	36,471
License [Member] \| Smart Sensing Products [Member]
Revenues	20,367	11,765	11,419
Royalty [Member]
Revenues	49,879	47,813	39,262
Royalty [Member] \| Transferred at Point in Time [Member]
Revenues	49,879	47,813	39,262
Royalty [Member] \| Connectivity Products [Member]
Revenues	36,960	37,917	34,206
Royalty [Member] \| Smart Sensing Products [Member]
Revenues	12,919	9,896	5,056
UNITED STATES
Revenues	26,718	20,813	16,627
UNITED STATES \| License [Member]
Revenues	16,685	6,716	15,203
UNITED STATES \| Royalty [Member]
Revenues	10,033	14,097	1,424
Europe and Middle East [Member]
Revenues	6,876	11,966	21,493
Europe and Middle East [Member] \| License [Member]
Revenues	2,938	6,176	5,282
Europe and Middle East [Member] \| Royalty [Member]
Revenues	3,938	5,790	16,211
Asia Pacific [Member]
Revenues	89,102	67,547	49,032
Asia Pacific [Member] \| License [Member]
Revenues	53,194	39,621	27,405
Asia Pacific [Member] \| Royalty [Member]
Revenues	35,908	27,926	$ 21,627
Other [Member]
Revenues	10	0
Other [Member] \| License [Member]
Revenues	10	0
Other [Member] \| Royalty [Member]
Revenues	$ 0	$ 0