Components of Other Income, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
French research tax credits	$ 1,535	$ 0	$ 0
Interest and dividend income	135	594	3,025
Interest expense	(241)	(229)	(677)
Gain (loss) on currency revaluation	(1,081)	56	0
Other	(94)	59	180
Other income, net	$ 254	$ 480	$ 2,528