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Share-Based Compensation - Narrative (Details) $ in Thousands			3 Months Ended
	Apr. 05, 2022	Apr. 28, 2021 SFr / shares shares	Mar. 31, 2025 USD ($) co-founder plan shares	Mar. 31, 2024 USD ($)	Dec. 31, 2024 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of share-based compensation plans \| plan			2
Share-based compensation expense \| $			$ 2,290	$ 1,677
Number of co-founders \| co-founder			3
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value \| $			$ 0
Equity Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation expense \| $			$ 1,583	960
Common shares issuable (in shares)			1,188,813
Weighted average period of recognition			2 years 7 months 13 days
Expiration period	10 years
Unrecognized compensation expense \| $			$ 23,900
ESPP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation expense \| $			725	717
Unrecognized share-based compensation expense, non-option awards \| $			$ 2,400
Weighted average period of recognition			9 months 18 days
ESPP \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESPP \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESPP \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESPP \| Share-Based Payment Arrangement, Tranche Four
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESOP
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation expense \| $			$ (18)	$ 0
ESOP \| Employee Stock Option Plan (ESOP) \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESOP \| Employee Stock Option Plan (ESOP) \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESOP \| Employee Stock Option Plan (ESOP) \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
ESOP \| Employee Stock Option Plan (ESOP) \| Share-Based Payment Arrangement, Tranche Four
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage			25.00%
Common Class A
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common shares issuable (in shares)			2,831,466
Share-based compensation arrangement by share-based payment award, number of shares authorized (in shares)			4,353,948
Common shares, shares outstanding (in shares)			63,474,253		63,077,431
Common Class C
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common shares, shares outstanding (in shares)			729,320		841,269
MoonLake AG
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Reverse vesting percentage		90.00%
Common shares, shares outstanding (in shares)		110,000
MoonLake AG \| MoonLake AG Restricted Founder Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common shares, shares outstanding (in shares)		99,000
Vesting percentage		4.166%
Vesting period		2 years
Nominal value (CHF per share) \| SFr / shares		SFr 0.10
MoonLake AG \| Common Class C
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common shares, shares outstanding (in shares)		3,700,257
MoonLake AG \| Common Class C \| MoonLake AG Restricted Founder Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common shares, shares outstanding (in shares)		3,330,231