Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net loss	$ (46,867)	$ (4,480)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	9	218
Stock-based compensation	6,971	586
Interest expense	863	0
Deferred income taxes	65	(6,255)
Tax benefit from therapeutic option right	0	(996)
Revaluation of contingent royalty obligation to Evolus Founders, a related party	10,500	0
Changes in assets and liabilities:
Prepaid expenses and other current assets	(992)	(160)
Accounts payable	1,275	(2,432)
Accrued expenses	2,733	303
Deferred rent	(13)	(6)
Other assets	(211)	0
Net cash used in operating activities	(25,667)	(13,222)
Cash flows from investing activities
Purchases of property and equipment	(9)	0
Net cash used in investing activities	(9)	0
Cash flows from financing activities
Proceeds from initial public offering, net of underwriting fees	56,330	0
Proceeds from follow-on offering, net of underwriting fees	67,680	0
Related party borrowings	1,127	14,321
Payments on related party borrowings	(5,000)	0
Payments for offering costs	(1,060)	(1,286)
Tax withholding paid on behalf of employees for stock-based awards	(239)	0
Net cash provided by financing activities	118,838	13,035
Change in cash and restricted cash	93,162	(187)
Cash and restricted cash, beginning of period	0	187
Cash, end of period	93,162	0
Noncash financing activities:
Related party receivable	73,690	(72,639)
Related party borrowings	(68,767)	0
Note obligation	(140,688)	138,687
Contingent royalty obligation payable to Evolus Founders, a related party	39,700	0
Contingent promissory note payable to Evolus Founders, a related party	16,042	0
Capital contribution from Parent, convertible note write-off	66,998	0
Capital distribution to Parent	0	(66,048)
Capital contribution from Parent, forgiveness of related party borrowings	13,188	0
Capital contribution from Parent - therapeutic option right, net of tax	0	1,505
Deferred offering costs accrued, unpaid	0	(839)
Deferred offering costs	(2,885)	0
Accounts payable, paid by Parent	$ (163)	$ 0