Note 4 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues	$ 30,457	$ 23,606	$ 55,859	$ 47,221
Transferred at Point in Time [Member]
Revenues	26,986	20,344	49,979	40,502
Transferred over Time [Member]
Revenues	3,471	3,262	5,880	6,719
Connectivity Products [Member]
Revenues	21,800	20,174	42,710	38,143
Smart Sensing Products [Member]
Revenues	8,657	3,432	13,149	9,078
License [Member]
Revenues	15,535	13,530	29,932	28,025
License [Member] | Transferred at Point in Time [Member]
Revenues	12,064	10,268	24,052	21,306
License [Member] | Transferred over Time [Member]
Revenues	3,471	3,262	5,880	6,719
License [Member] | Connectivity Products [Member]
Revenues	9,713	11,931	22,518	22,858
License [Member] | Smart Sensing Products [Member]
Revenues	5,822	1,599	7,414	5,167
Royalty [Member]
Revenues	14,922	10,076	25,927	19,196
Royalty [Member] | Transferred at Point in Time [Member]
Revenues	14,922	10,076	25,927	19,196
Royalty [Member] | Transferred over Time [Member]
Revenues	0	0	0	0
Royalty [Member] | Connectivity Products [Member]
Revenues	12,087	8,243	20,192	15,285
Royalty [Member] | Smart Sensing Products [Member]
Revenues	2,835	1,833	5,735	3,911
UNITED STATES
Revenues	6,548	2,624	10,498	5,919
UNITED STATES | License [Member]
Revenues	4,722	1,967	5,294	4,749
UNITED STATES | Royalty [Member]
Revenues	1,826	657	5,204	1,170
Europe and Middle East [Member]
Revenues	906	8,845	2,005	13,948
Europe and Middle East [Member] | License [Member]
Revenues	410	3,574	833	4,633
Europe and Middle East [Member] | Royalty [Member]
Revenues	496	5,271	1,172	9,315
Asia Pacific [Member]
Revenues	23,003	12,137	43,356	27,354
Asia Pacific [Member] | License [Member]
Revenues	10,403	7,989	23,805	18,643
Asia Pacific [Member] | Royalty [Member]
Revenues	$ 12,600	$ 4,148	$ 19,551	$ 8,711