Stockholders' Equity - Additional Information (Details) - $ / shares	9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Jun. 30, 2025
Class A Common Stock [Member]
Stockholders’ Equity [Line Items]
Common stock voting rights	one
Price per share (in Dollars per share)	$ 0.001		$ 0.001
Warrant purchase shares				21,920,318
Class A Common Stock [Member] \| Warrants Expiring On February 12, 2026 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	5,536
Warrants exercise price per share (in Dollars per share)	$ 120
Expire date	Feb. 12, 2026
Class A Common Stock [Member] \| Warrants Expiring On December 1, 2026 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	4,679
Warrants exercise price per share (in Dollars per share)	$ 175
Expire date	Dec. 01, 2026
Class A Common Stock [Member] \| Warrants Expiring On October 11, 2028 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	16,971
Warrants exercise price per share (in Dollars per share)	$ 20.625
Expire date	Oct. 11, 2028
Class A Common Stock [Member] \| Warrants Expiring On June 22, 2029 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	135,531
Warrants exercise price per share (in Dollars per share)	$ 16.2
Expire date	Jun. 22, 2029
Class A Common Stock [Member] \| Warrants Expiring On December 20, 2028 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	9,489
Warrants exercise price per share (in Dollars per share)	$ 21.813
Expire date	Dec. 20, 2028
Class A Common Stock [Member] \| Warrants Expiring On April 10, 2029 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	297,872
Warrants exercise price per share (in Dollars per share)	$ 2.35
Expire date	Apr. 10, 2029
Class A Common Stock [Member] \| Warrants Expiring On April 8, 2029 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	154,894
Warrants exercise price per share (in Dollars per share)	$ 2.9375
Expire date	Apr. 08, 2029
Class A Common Stock [Member] \| Warrants Expiring On April 18, 2029 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	2,349,744
Warrants exercise price per share (in Dollars per share)	$ 2.35
Expire date	Apr. 18, 2029
Class A Common Stock [Member] \| Warrants Expiring On April 18, 2029 One [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	167,982
Warrants exercise price per share (in Dollars per share)	$ 3.25
Expire date	Apr. 18, 2029
Class A Common Stock [Member] \| Warrants Expiring On June 18, 2026 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	49,130
Warrants exercise price per share (in Dollars per share)	$ 2.9375
Expire date	Jun. 18, 2026
Class A Common Stock [Member] \| Warrants Expiring On June 18, 2026 One [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	926,596
Warrants exercise price per share (in Dollars per share)	$ 2.5
Expire date	Jun. 18, 2026
Class A Common Stock [Member] \| Warrants Expiring On June 18, 2026 Two [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	118,852
Warrants exercise price per share (in Dollars per share)	$ 3.25
Expire date	Jun. 18, 2026
Class A Common Stock [Member] \| Warrants Expiring On July 17, 2026 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	10,500
Warrants exercise price per share (in Dollars per share)	$ 3.125
Expire date	Jul. 17, 2026
Class A Common Stock [Member] \| Warrants Expiring On July 24, 2026 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	162,344
Warrants exercise price per share (in Dollars per share)	$ 3.125
Expire date	Jul. 24, 2026
Class A Common Stock [Member] \| Warrants Expiring On July 20, 2026 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	2,236,026
Warrants exercise price per share (in Dollars per share)	$ 3.9
Expire date	Jul. 20, 2026
Class A Common Stock [Member] \| Warrants Expiring On July 20, 2026 One [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	156,522
Warrants exercise price per share (in Dollars per share)	$ 5.0313
Expire date	Jul. 20, 2026
Class A Common Stock [Member] \| Warrants Expiring On August 11, 2027 [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	14,705,885
Warrants exercise price per share (in Dollars per share)	$ 0.85
Expire date	Aug. 11, 2027
Class A Common Stock [Member] \| Warrants Expiring On August 11, 2027 One [Member]
Stockholders’ Equity [Line Items]
Warrant purchase shares	411,765
Warrants exercise price per share (in Dollars per share)	$ 1.0625
Expire date	Aug. 11, 2027
Class B Common Stock [Member]
Stockholders’ Equity [Line Items]
Common stock voting rights	five
Price per share (in Dollars per share)	$ 0.001		$ 0.001
Common Stock [Member] \| Class A Common Stock [Member]
Stockholders’ Equity [Line Items]
Stockholders shares converted	0	1,555	1,555
Common Stock [Member] \| Class B Common Stock [Member]
Stockholders’ Equity [Line Items]
Stockholders shares converted		(1,555)	1,555

Longeveron Inc. 10-Q