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Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Feb. 26, 2024	Feb. 07, 2024	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 5,500	$ 500
Share-based compensation arrangement exercise price			$ 24.23		$ 13.82
Common Stock, Par or Stated Value Per Share			$ 0.0001		$ 0.0001
Aggregate fair value of restricted stock			$ 1,500	$ 800
Common stock shares issued			24,695,885		24,360,233
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount			$ 53,348
2021 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares issued			5,736	0
Restricted Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares issued			63,061
Restricted Common Stock [Member] \| Founders And Certain Employees [Member] \| Disc Medicine Inc [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common Stock, Par or Stated Value Per Share			$ 0.0001
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for options grant	36,666	36,666
Share-based compensation arrangement option award percentage	25.00%	25.00%
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount			$ 22,595
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 years 10 months 13 days
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for options grant	55,000	55,000
Share-based compensation arrangement option award period	10 years	10 years
Share-based compensation arrangement vesting period	36 months	36 months
Share-based compensation arrangement option award percentage	25.00%	25.00%
Share-based compensation arrangement exercise price	$ 64.66	$ 65.25
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount			$ 30,753
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 years 4 months 13 days