Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	$ (9,740)	$ (16,934)	$ (3,125)
Other comprehensive income (loss)	189	26	(219)
End of the period	65,343	(9,740)	(16,934)
Accumulated translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	165	139	298
Other comprehensive income (loss)	13	26	(159)
End of the period	178	165	139
Accumulated unrealized holding gains (losses) on available-for-sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	(67)	(67)	(7)
Other comprehensive income (loss)	176	0	(60)
End of the period	109	(67)	(67)
Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	98	72	291
Other comprehensive income (loss)	189	26	(219)
End of the period	$ 287	$ 98	$ 72