Note 2 - Summary of Significant Accounting Policies - Revenue by Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue	$ 55,701	$ 45,344	$ 105,992	$ 84,144
SaaS [Member
Revenue	27,619	20,586	54,172	38,845
Termed License and Support [Member]
Revenue	14,011	11,088	24,213	19,815
Service [Member]
Revenue	9,848	7,302	18,773	13,218
Maintenance [Member]
Revenue	4,067	5,458	8,508	10,867
License [Member]
Revenue	$ 156	$ 910	$ 326	$ 1,399