Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenues		$ 4,720	$ 6,094	$ 9,881	$ 12,402
Subscriptions [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2,926	3,754	6,289	7,763
Strategic Agreements [Member]
Disaggregation Of Revenue [Line Items]
Revenues		1,794	2,340	3,592	4,639
United States of America [Member]
Disaggregation Of Revenue [Line Items]
Revenues		3,730	4,687	7,686	9,453
United Kingdom [Member]
Disaggregation Of Revenue [Line Items]
Revenues		525	758	1,156	1,638
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 465	$ 649	$ 1,039	$ 1,311

[1] No individual country within the “Other” category accounted for 10% or more of revenues for any period presented.