Note 2 - Summary of Significant Accounting Policies - Revenue by Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 62,739	$ 53,927	$ 168,731	$ 138,071
SaaS [Member
Revenue	29,959	22,410	84,131	61,255
Termed License and Support [Member]
Revenue	18,288	17,477	42,501	37,292
Service [Member]
Revenue	10,458	8,143	29,231	21,361
Maintenance [Member]
Revenue	3,754	5,293	12,262	16,160
License [Member]
Revenue	$ 280	$ 604	$ 606	$ 2,003