Fair Value Measurements - Assets and Liabilities on a Recurring Basis (Details) - Contingent royalty obligation payable to Evolus Founders - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent royalty obligation payable to Evolus Founders	$ 47,404	$ 46,310
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent royalty obligation payable to Evolus Founders	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent royalty obligation payable to Evolus Founders	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent royalty obligation payable to Evolus Founders	$ 47,404	$ 46,310