Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 11,378	$ 10,070
Total subscription revenue
Disaggregation of Revenue [Line Items]
Revenue	9,164	6,902
Total subscription term-based licenses
Disaggregation of Revenue [Line Items]
Revenue	5,935	3,584
Multi-year subscription term-based licenses
Disaggregation of Revenue [Line Items]
Revenue	3,131	1,823
1-year subscription term-based licenses
Disaggregation of Revenue [Line Items]
Revenue	2,804	1,761
Subscription SaaS
Disaggregation of Revenue [Line Items]
Revenue	2,296	2,328
Support and maintenance
Disaggregation of Revenue [Line Items]
Revenue	933	990
Perpetual licenses
Disaggregation of Revenue [Line Items]
Revenue	156	1,313
Services and other
Disaggregation of Revenue [Line Items]
Revenue	$ 2,058	$ 1,855