Note 4 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Property, Plant and Equipment, Net	$ 45,161		$ 47,428
Depreciation, Depletion And Amortization, Excluding Intangible Asset Amortization	6,500	$ 7,100
Scanner Appliances and Other Computer Equipment Subject To Subscription [Member]
Property, Plant and Equipment, Net	10,100		6,700
Scanner Appliances and Other Computer Equipment Not Placed In Service [Member]
Property, Plant and Equipment, Net	$ 6,700		$ 4,000