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v3.19.1

Related Party Transactions (Details) |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 12, 2018 USD ($) | Feb. 11, 2018 USD ($) | Dec. 14, 2017 USD ($) | Nov. 30, 2017 USD ($) | Jan. 31, 2018 USD ($) | Apr. 30, 2017 agreement | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) transaction | Dec. 31, 2018 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  |  | $ 134,000,000 |  |  |  | $ 123,025,000
Related party receivable |  |  |  |  |  |  | 0 | $ 73,690,000 |  |  |
Contingent royalty obligation payable to Evolus Founders, a related party | $ 39,700,000 |  |  |  |  |  | 45,900,000 |  |  |  | 50,200,000
Contingent promissory note payable to Evolus Founders, a related party | 16,000,000 |  |  |  |  |  | 17,153,000 |  |  |  | $ 16,904,000
ALPHAEON |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Redemption price on debt |  | 250.00% |  |  |  |  |  |  |  |  |
Total amounts of transaction |  | $ 140,700,000 |  |  |  |  |  |  |  |  |
Notes receivable from related parties |  | 56,300,000 |  |  |  |  |  |  |  |  |
Period available to cure breach |  |  | 30 days |  |  |  |  |  |  |  |
Unwinding fee |  |  |  | $ 9,600,000 |  |  |  |  |  |  |
ALPHAEON | Chief Executive Officer |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Related party transaction amount in period |  |  |  |  |  |  |  | 800,000 |  |  |
Related party receivable |  |  |  |  |  |  |  | 100,000 |  |  |
ALPHAEON | Convertible Note |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, number of debt transactions | transaction |  |  |  |  |  |  |  |  |  | 2 |
Interest rate on debt |  |  |  |  |  |  |  |  |  | 10.00% |
Number of guaranty and security agreements | agreement |  |  |  |  |  | 2 |  |  |  |  |
Redemption price on debt |  |  |  |  |  | 2.50% |  |  |  |  |
ALPHAEON | Convertible Note | Bridge Note |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  |  | $ 2,500,000.0 |
ALPHAEON | Convertible Note | Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  |  | $ 55,000,000 |
Evolus, Inc. |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Due to related parties |  |  | $ 1,600,000 |  |  |  |  |  |  |  |
Percentage of voting interests acquired |  |  | 50.00% |  |  |  |  |  |  |  |
Evolus, Inc. | Chief Medical Officer |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Due to related parties |  |  | $ 700,000 |  |  |  |  |  |  |  |
Evolus, Inc. | SCH |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Related party transaction amount in period | 55,700,000 |  | 20,000,000 |  |  |  |  |  |  |  |
Up-front payment upon obtaining FDA approval |  |  | $ 9,200,000 |  |  |  |  |  |  |  |
Period of anniversary |  |  | 2 years 6 months |  |  |  |  |  |  |  |
Period of termination of first commercial sale |  |  | 10 years |  |  |  |  |  |  |  |
General and administrative | ALPHAEON |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Related party transaction amount in period |  |  |  |  |  |  |  | 400,000 |  |  |
ALPHAEON | Majority Shareholder |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total amounts of transaction | 140,700,000 |  |  |  |  |  |  | $ 2,000,000 | $ 138,700,000 |  |
Accumulated deficit |  | $ 600,000 |  |  |  |  |  |  |  |  |
Related party receivable | 73,700,000 |  |  |  | $ 1,100,000 |  | $ 73,700,000 |  |  |  |
Due from related parties | $ 67,000,000 |  |  |  |  |  |  |  |  |  |

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