Shareholders’ Equity - Narrative (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Nov. 06, 2025 USD ($) $ / shares shares	Mar. 31, 2026 USD ($) vote $ / shares shares	Dec. 31, 2025 $ / shares shares	Mar. 31, 2025 shares	Dec. 31, 2024 shares	Aug. 31, 2023 USD ($)
Class of Stock [Line Items]
Common stock, conversion ratio (in shares)		33.638698
August 2023 Sales Agreement \| ATM Shares
Class of Stock [Line Items]
Sale of stock, authorized amount (in shares) \| $		$ 258.8				$ 350.0
Underwriting Agreement
Class of Stock [Line Items]
Sale of stock (in shares)	7,142,857
Price per share (USD per share) \| $ / shares	$ 10.50
Net proceeds from the transaction \| $	$ 72.4
Payments of stock issuance costs \| $	$ 2.6
Sales Agreements
Class of Stock [Line Items]
Sale of stock (in shares)		336,559
Net proceeds from the transaction \| $		$ 6.0
Sales Agreements \| Weighted Average
Class of Stock [Line Items]
Price per share (USD per share) \| $ / shares		$ 18.28
Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		0
Preferred stock, shares outstanding (in shares)		0
Preferred shares, shares authorized (in shares)		5,000,000
Preferred shares, par value (in usd per share) \| $ / shares		$ 0.0001
Preferred stock, votes attached to shares \| vote		1
Common Class A
Class of Stock [Line Items]
Common shares, shares issued (in shares)		72,134,066	71,373,579
Common shares, shares outstanding (in shares)		72,134,066	71,373,579
Common shares, shares authorized (in shares)		500,000,000	500,000,000
Common shares, par value (USD per share) \| $ / shares		$ 0.0001	$ 0.0001
Common Class A \| Common Stock
Class of Stock [Line Items]
Common shares, shares issued (in shares)		72,134,066
Common shares, shares outstanding (in shares)		72,134,066	71,373,579	63,474,253	63,077,431
Common shares, shares authorized (in shares)		500,000,000
Common shares, par value (USD per share) \| $ / shares		$ 0.0001
Common shares, votes per share \| vote		1
Common Class B \| Common Stock
Class of Stock [Line Items]
Common shares, shares issued (in shares)		0
Common shares, shares outstanding (in shares)		0
Common shares, shares authorized (in shares)		50,000,000
Common shares, par value (USD per share) \| $ / shares		$ 0.0001
Common shares, votes per share \| vote		1
Common Class C \| Common Stock
Class of Stock [Line Items]
Common shares, shares issued (in shares)		0
Common shares, shares outstanding (in shares)		0		729,320	841,269
Common shares, shares authorized (in shares)		100,000,000
Common shares, par value (USD per share) \| $ / shares		$ 0.0001
Common shares, votes per share \| vote		1

MoonLake Immunotherapeutics 10-Q