Note 8 - Geographic Information and Major Customer Data - Revenues Based On Customer Location (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues		$ 33,195	$ 30,457	$ 67,586	$ 55,859
UNITED STATES
Revenues		6,991	6,548	13,737	10,498
Europe and Middle East [Member]
Revenues		2,772	906	3,874	2,005
Asia Pacific [Member]
Revenues	[1]	23,432	23,003	49,975	43,356
CHINA
Revenues		$ 18,601	$ 19,189	$ 41,572	$ 36,448

[1] China