Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues [Abstract]
Total revenues	$ 1,408	$ 3,225	$ 2,852	$ 5,611
OPERATING EXPENSES:
Cost of sales	44	127	142	246
Research and development	2,868	3,873	5,878	8,058
General and administrative	4,363	4,249	9,360	8,973
Total operating expenses	7,275	8,249	15,380	17,277
Loss from operations	(5,867)	(5,024)	(12,528)	(11,666)
OTHER INCOME (EXPENSES):
Interest income	463	382	925	792
Loss on marketable equity securities, net	(10)	(150)	(15)	(110)
Foreign currency transaction loss, net	(378)	(497)	(732)	(969)
Other income	19	86	19	543
Total other income (expenses)	94	(179)	197	256
Loss before net income tax benefit	(5,773)	(5,203)	(12,331)	(11,410)
Provision for income tax benefit	0	0	0	1,803
NET LOSS	(5,773)	(5,203)	(12,331)	(9,607)
Net (income) loss attributable to noncontrolling interest	13	(26)	29	6
NET LOSS ATTRIBUTABLE TO LINEAGE	$ (5,760)	$ (5,229)	$ (12,302)	$ (9,601)
Net loss per common share attributable to Lineage, basic	$ (0.03)	$ (0.03)	$ (0.07)	$ (0.06)
Net loss per common share attributable to Lineage, diluted	$ (0.03)	$ (0.03)	$ (0.07)	$ (0.06)
Weighted-average common shares used to compute net loss per common share, basic	188,813	170,592	185,861	170,361
Weighted-average common shares used to compute net loss per common share, diluted	188,813	170,592	185,861	170,361
Collaboration Revenues [Member]
Revenues [Abstract]
Total revenues	$ 1,098	$ 2,871	$ 2,285	$ 4,992
Royalties, License and Other Revenues [Member]
Revenues [Abstract]
Total revenues	$ 310	$ 354	$ 567	$ 619