Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) income from consolidated operations	$ (15,849)	$ 153,557
Other comprehensive income (loss):
Foreign currency translation gain	168	123
Net gain (loss) on available-for-sale debt securities, net of tax	5,329	(11,738)
Comprehensive (loss) income from consolidated operations	(10,352)	141,942
Net loss attributable to noncontrolling interest	509	422
Foreign currency translation gain attributable to noncontrolling interest	(1,790)	(119)
Comprehensive (income) loss attributable to noncontrolling interest	(1,281)	303
Comprehensive (loss) income attributable to Fulgent	$ (11,633)	$ 142,245