Note 10 - Customer and Geographic Information - Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2020	[1]	Dec. 31, 2019	[2]
Long-lived assets	$ 48,377		$ 48,407
UNITED STATES
Long-lived assets	46,065		46,000
Rest of the World [Member]
Long-lived assets	$ 2,312		$ 2,407

[1] Amounts consist of property and equipment, net, and operating lease right-of-use assets, net

[2] Amounts consist of property and equipment, net