Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues	$ 23,606	$ 18,400	$ 47,221	$ 35,369
Transferred at Point in Time [Member]
Revenues	20,344	14,992	40,502	28,861
Transferred over Time [Member]
Revenues	3,262	3,408	6,719	6,508
Connectivity Products [Member]
Revenues	20,174	15,140	38,143	27,392
Smart Sensing Products [Member]
Revenues	3,432	3,260	9,078	7,977
License [Member]
Revenues	13,530	10,804	28,025	21,815
License [Member] | Transferred at Point in Time [Member]
Revenues	10,268	7,396	21,306	15,307
License [Member] | Transferred over Time [Member]
Revenues	3,262	3,408	6,719	6,508
License [Member] | Connectivity Products [Member]
Revenues	11,931	8,085	22,858	14,716
License [Member] | Smart Sensing Products [Member]
Revenues	1,599	2,719	5,167	7,099
Royalty [Member]
Revenues	10,076	7,596	19,196	13,554
Royalty [Member] | Transferred at Point in Time [Member]
Revenues	10,076	7,596	19,196	13,554
Royalty [Member] | Transferred over Time [Member]
Revenues	0	0	0	0
Royalty [Member] | Connectivity Products [Member]
Revenues	8,243	7,055	15,285	12,676
Royalty [Member] | Smart Sensing Products [Member]
Revenues	1,833	541	3,911	878
UNITED STATES
Revenues	2,624	2,123	5,919	3,902
UNITED STATES | License [Member]
Revenues	1,967	1,866	4,749	3,359
UNITED STATES | Royalty [Member]
Revenues	657	257	1,170	543
Europe and Middle East [Member]
Revenues	8,845	2,992	13,948	6,334
Europe and Middle East [Member] | License [Member]
Revenues	3,574	225	4,633	1,607
Europe and Middle East [Member] | Royalty [Member]
Revenues	5,271	2,767	9,315	4,727
Asia Pacific [Member]
Revenues	12,137	13,285	27,354	25,133
Asia Pacific [Member] | License [Member]
Revenues	7,989	8,713	18,643	16,849
Asia Pacific [Member] | Royalty [Member]
Revenues	$ 4,148	$ 4,572	$ 8,711	$ 8,284