Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Summary of Financial Instruments Measured at Fair Value on Recurring Basis

The following table sets forth the Company’s financial instruments that were measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):

	Fair Value Measurements at March 31, 2023
	Total		Level 1		Level 2		Level 3
Liabilities
2018 PIPE warrant liability	$	1	$	—	$	—	$	1
Essentialis purchase price contingency liability		9,134		—		—		9,134
Total common stock warrant and contingent    consideration liability	$	9,135	$	—	$	—	$	9,135

	Fair Value Measurements at December 31, 2022
	Total		Level 1		Level 2		Level 3
Liabilities
2018 PIPE warrant liability	$	1	$	—	$	—	$	1
Essentialis purchase price contingency liability		8,835		—		—		8,835
Total common stock warrant and contingent    consideration liability	$	8,836	$	—	$	—	$	8,836

Summary of Changes in Fair Value of Level 3 Financial Instruments

The following table sets forth a summary of the changes in the fair value of the Company’s Level 3 liabilities for the three months ended March 31, 2023 and 2022 (dollars in thousands):

	2018 PIPE Warrants					Purchase Price
	Number of Warrants		Liability			Contingent Liability
Balance at January 1, 2023		34,241	$	1		$	8,835
Change in value of 2018 PIPE Warrants		—		—			—
Change in value of contingent liability		—		—			299
Balance at March 31, 2023		34,241	$	1		$	9,134
	2018 PIPE Warrants					Purchase Price
	Number of Warrants		Liability			Contingent Liability
Balance at January 1, 2022		34,241	$	31		$	9,547
Change in value of 2018 PIPE Warrants		—		(27	)		—
Change in value of contingent liability		—		—			(858	)
Balance at March 31, 2022		34,241	$	4		$	8,689