Fair Value Measurements (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2023

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

Assets measured at fair value on a recurring basis were as follows:

Description	September 30, 2023		Quoted Prices (Unadjusted) in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash equivalents:
Money market mutual funds	$	28,375	$	28,375	$	—	$	—
Total cash equivalents	$	28,375	$	28,375	$	—	$	—
Short-term investments:
Commercial paper	$	3,963	$	—	$	3,963	$	—
US Treasury securities		55,267		—		55,267		—
Corporate debt securities		14,957		—		14,957		—
Total short-term investments	$	74,187	$	—	$	74,187	$	—
Total financial assets	$	102,562	$	28,375	$	74,187	$	—

Description	December 31, 2022		Quoted Prices (Unadjusted) in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash equivalents:
Money market mutual funds	$	33,967	$	33,967	$	—	$	—
Total cash equivalents	$	33,967	$	33,967	$	—	$	—
Short-term investments:
Commercial paper	$	57,138	$	—	$	57,138	$	—
US Treasury securities		64,825		—		64,825		—
Corporate debt securities		19,077		—		19,077		—
Total short-term investments	$	141,040	$	—	$	141,040	$	—
Total financial assets	$	175,007	$	33,967	$	141,040	$	—

Assets measured at fair value on a recurring basis were as follows:

Description	December 31, 2022		Quoted Prices (Unadjusted) in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash equivalents:
Money market mutual funds	$	33,967	$	33,967	$	—	$	—
Total cash equivalents	$	33,967	$	33,967	$	—	$	—
Short-term investments:
Commercial paper	$	57,138	$	—	$	57,138	$	—
US Treasury securities		64,825		—		64,825		—
Corporate debt securities		19,077		—		19,077		—
Total short-term investments	$	141,040	$	—	$	141,040	$	—
Total financial assets	$	175,007	$	33,967	$	141,040	$	—

Description	December 31, 2021		Quoted Prices (Unadjusted) in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash equivalents:
Money market mutual funds	$	108,323	$	108,323	$	—	$	—
Total cash equivalents	$	108,323	$	108,323	$	—	$	—
Short-term investments:
Commercial paper	$	27,992	$	—	$	27,992	$	—
Corporate debt securities		19,499		—		19,499		—
Total short-term investments	$	47,491	$	—	$	47,491	$	—
Total financial assets	$	155,814	$	108,323	$	47,491	$	—