Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Consolidated net loss	$ (11,952)	$ (12,154)
Other comprehensive loss:
Change in unrealized gain (loss) on available-for-sale investments, net of tax	185	(496)
Comprehensive loss	(11,767)	(12,650)
Comprehensive loss attributable to noncontrolling interest in Pangu BioPharma Limited	1	1
Comprehensive loss attributable to aTyr Pharma, Inc. common stockholders	$ (11,766)	$ (12,649)