Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Revenues		$ 24,420	$ 29,983
Subscriptions [Member]
Disaggregation Of Revenue [Line Items]
Revenues		15,648	20,561
Strategic Agreements [Member]
Disaggregation Of Revenue [Line Items]
Revenues		8,772	9,422
United States of America [Member]
Disaggregation Of Revenue [Line Items]
Revenues		18,817	22,409
United Kingdom [Member]
Disaggregation Of Revenue [Line Items]
Revenues		2,851	3,905
Other [Member]
Disaggregation Of Revenue [Line Items]
Revenues	[1]	$ 2,752	$ 3,669

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