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Disaggregation of Revenue Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 62,671	$ 61,508	$ 186,450	$ 191,566
Percentage of total revenue	100.00%	100.00%	100.00%	100.00%
UNITED STATES
Revenues	$ 23,275	$ 19,960	$ 66,026	$ 62,475
Percentage of total revenue	37.00%	32.00%	35.00%	33.00%
Europe [Member]
Revenues	$ 18,571	$ 18,827	$ 55,825	$ 56,439
Percentage of total revenue	30.00%	31.00%	30.00%	29.00%
The rest of the world [Member]
Revenues	$ 20,825	$ 22,721	$ 64,599	$ 72,652
Percentage of total revenue	33.00%	37.00%	35.00%	38.00%

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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