Goodwill and Intangible Assets - Summary of Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 50,897
Goodwill, Beginning Balance	50,897
Goodwill acquired during year	93,900	$ 50,566
Goodwill, Ending Balance	143,027	50,897
Goodwill, Ending Balance	143,027	50,897
Inform Diagnostics
Goodwill [Line Items]
Goodwill acquired during year	71,845
Fulgent Pharma Holdings
Goodwill [Line Items]
Goodwill acquired during year	22,055
CSI
Goodwill [Line Items]
Goodwill acquired during year		27,484
FF Gene Biotech
Goodwill [Line Items]
Goodwill acquired during year		23,082
Net exchange differences	$ (1,770)	$ 331