Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income from consolidated operations	$ 141,923	$ 506,239	$ 214,310
Other comprehensive income (loss):
Foreign currency translation (loss) gain	(2,665)	456	20
Net (loss) gain on available-for-sale debt securities, net of tax	(19,940)	(1,548)	272
Comprehensive income from consolidated operations	119,318	505,147	214,602
Net loss attributable to noncontrolling interest	1,480	1,125
Foreign currency translation loss (gain) attributable to noncontrolling interest	2,461	(105)
Comprehensive loss attributable to noncontrolling interest	3,941	1,020
Comprehensive income attributable to Fulgent	$ 123,259	$ 506,167	$ 214,602