CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Preferred Stock Convertible Preferred Stock	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	ACCUMULATED OTHER COMPREHENSIVE LOSS	ACCUMULATED DEFICIT
Beginning balance at Dec. 31, 2021	$ (42,887)	$ 149,749	$ 1	$ 2,314		$ (45,202)
Beginning balance, shares at Dec. 31, 2021		61,730,064	3,435,014
Exercise of common stock options	228			228
Exercise of common stock options, shares			122,475
Vesting of restricted stock awards and stock options	64			64
Stock-based compensation	654			654
Net loss	(8,669)					(8,669)
Ending balance at Mar. 31, 2022	(50,610)	$ 149,749	$ 1	3,260		(53,871)
Ending balance, shares at Mar. 31, 2022		61,730,064	3,557,489
Beginning balance at Dec. 31, 2021	(42,887)	$ 149,749	$ 1	2,314		(45,202)
Beginning balance, shares at Dec. 31, 2021		61,730,064	3,435,014
Net loss	(28,112)
Ending balance at Sep. 30, 2022	(68,097)	$ 149,749	$ 1	5,216		(73,314)
Ending balance, shares at Sep. 30, 2022		61,730,064	3,558,551
Beginning balance at Mar. 31, 2022	(50,610)	$ 149,749	$ 1	3,260		(53,871)
Beginning balance, shares at Mar. 31, 2022		61,730,064	3,557,489
Exercise of common stock options	5			5
Exercise of common stock options, shares			1,062
Vesting of restricted stock awards and stock options	80			80
Stock-based compensation	701			701
Net loss	(8,889)					(8,889)
Ending balance at Jun. 30, 2022	(58,713)	$ 149,749	$ 1	4,046		(62,760)
Ending balance, shares at Jun. 30, 2022		61,730,064	3,558,551
Vesting of restricted stock awards and stock options	69			69
Stock-based compensation	1,101			1,101
Net loss	(10,554)					(10,554)
Ending balance at Sep. 30, 2022	(68,097)	$ 149,749	$ 1	5,216		(73,314)
Ending balance, shares at Sep. 30, 2022		61,730,064	3,558,551
Beginning balance at Dec. 31, 2022	(76,825)	$ 149,749	$ 1	6,038		(82,864)
Beginning balance, shares at Dec. 31, 2022		61,730,064	3,570,019
Exercise of common stock options	140			140
Exercise of common stock options, shares			55,599
Vesting of restricted stock awards and stock options	73			73
Conversion of convertible preferred stock to common stock	149,749	$ (149,749)	$ 18	149,731
Conversion of convertible preferred stock to common stock, shares		(61,730,064)	18,216,847
Issuance of common stock in the Financing Transaction, net of issuance costs	159,544		$ 13	159,531
Issuance of common stock in the Financing Transaction, net of issuance costs, shares			12,638,636
Issuance of common stock to former stockholders of Imara Inc. in connection with the Merger	80,241		$ 7	80,234
Issuance of common stock to former stockholders of Imara Inc. in connection with the Merger, shares			6,625,176
Adjustment for change in common stock par value in connection with the Merger			$ 2	(2)
Reverse recapitalization transaction costs	(9,044)			(9,044)
Stock-based compensation	2,262			2,262
Net loss	(14,724)					(14,724)
Ending balance at Mar. 31, 2023	291,416		$ 41	388,963		(97,588)
Ending balance, shares at Mar. 31, 2023			41,106,277
Beginning balance at Dec. 31, 2022	(76,825)	$ 149,749	$ 1	6,038		(82,864)
Beginning balance, shares at Dec. 31, 2022		61,730,064	3,570,019
Net loss	(52,214)
Ending balance at Sep. 30, 2023	261,748		$ 41	396,932	$ (147)	(135,078)
Ending balance, shares at Sep. 30, 2023			41,204,973
Beginning balance at Mar. 31, 2023	291,416		$ 41	388,963		(97,588)
Beginning balance, shares at Mar. 31, 2023			41,106,277
Exercise of common stock options	141			141
Exercise of common stock options, shares			44,834
Vesting of restricted stock awards and stock options	74			74
Stock-based compensation	4,195			4,195
Net loss	(16,721)					(16,721)
Other comprehensive loss	(111)				(111)
Ending balance at Jun. 30, 2023	278,994		$ 41	393,373	(111)	(114,309)
Ending balance, shares at Jun. 30, 2023			41,151,111
Exercise of common stock options	84			84
Exercise of common stock options, shares			48,112
Vesting of restricted stock units			5,750
Vesting of restricted stock awards and stock options	74			74
Stock-based compensation	3,401			3,401
Net loss	(20,769)					(20,769)
Other comprehensive loss	(36)				(36)
Ending balance at Sep. 30, 2023	$ 261,748		$ 41	$ 396,932	$ (147)	$ (135,078)
Ending balance, shares at Sep. 30, 2023			41,204,973