Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 23,615	$ 16,969
Transferred at Point in Time [Member]
Revenues	20,158	13,869
Transferred over Time [Member]
Revenues	3,457	3,100
Connectivity Products [Member]
Revenues	17,969	12,251
Smart Sensing Products [Member]
Revenues	5,646	4,718
License [Member]
Revenues	14,495	11,011
License [Member] | Transferred at Point in Time [Member]
Revenues	11,038	7,911
License [Member] | Transferred over Time [Member]
Revenues	3,457	3,100
License [Member] | Connectivity Products [Member]
Revenues	10,927	6,631
License [Member] | Smart Sensing Products [Member]
Revenues	3,568	4,380
Royalty [Member]
Revenues	9,120	5,958
Royalty [Member] | Transferred at Point in Time [Member]
Revenues	9,120	5,958
Royalty [Member] | Transferred over Time [Member]
Revenues
Royalty [Member] | Connectivity Products [Member]
Revenues	7,042	5,620
Royalty [Member] | Smart Sensing Products [Member]
Revenues	2,078	338
UNITED STATES
Revenues	3,295	1,779
UNITED STATES | License [Member]
Revenues	2,782	1,493
UNITED STATES | Royalty [Member]
Revenues	513	286
Europe and Middle East [Member]
Revenues	5,103	3,342
Europe and Middle East [Member] | License [Member]
Revenues	1,059	1,382
Europe and Middle East [Member] | Royalty [Member]
Revenues	4,044	1,960
Asia Pacific [Member]
Revenues	15,217	11,848
Asia Pacific [Member] | License [Member]
Revenues	10,654	8,136
Asia Pacific [Member] | Royalty [Member]
Revenues	$ 4,563	$ 3,712