Note 9 - Geographic Information and Major Customer Data - Revenues Based On Customer Location (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
UNITED STATES
Revenues	6,548	2,624	10,498	5,919
Europe and Middle East [Member]
Revenues	906	8,845	2,005	13,948
Asia Pacific [Member]
Revenues	23,003	12,137	43,356	27,354
GERMANY
Revenues		4,925		8,889
CHINA
Revenues	$ 19,189	$ 9,554	$ 36,448	$ 21,628