Note 10 - CUSTOMER AND GEOGRAPHIC INFORMATION - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues	$ 34,668	$ 27,419	$ 68,166	$ 51,619
Geographic Concentration Risk [Member] | Revenue Benchmark [Member]
Revenues	$ 34,668	$ 27,419	$ 68,166	$ 51,619
Concentration risk	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | UNITED STATES
Revenues	$ 17,086	$ 12,095	$ 34,577	$ 20,651
Concentration risk	49.00%	44.00%	51.00%	40.00%
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | CHINA
Revenues	$ 4,539	$ 4,289	$ 8,659	$ 6,028
Concentration risk	13.00%	16.00%	13.00%	12.00%
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | JAPAN
Revenues	$ 2,794	$ 2,450	$ 5,401	$ 6,028
Concentration risk	8.00%	9.00%	8.00%	12.00%
Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | Rest of the World [Member]
Revenues	$ 10,249	$ 8,585	$ 19,529	$ 18,912
Concentration risk	30.00%	31.00%	28.00%	36.00%