Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Net Revenue by Service Line

The following table summarizes the Company’s net patient service revenue from continuing operations by service line (in percentages):

	Years Ended December 31,
	2023			2022			2021
Neonatology and other pediatric subspecialties		80	%		79	%		77	%
Maternal-fetal medicine		16	%		16	%		18	%
Pediatric cardiology		4	%		5	%		5	%
		100	%		100	%		100	%

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table presents information about the Company’s financial instruments that are accounted for at fair value on a recurring basis at December 31, 2023 and 2022 (in thousands):

		Fair Value
	Fair Value Category	December 31, 2023		December 31, 2022
Assets:
Money market funds	Level 1	$	2,814	$	1,415
Short-term investments	Level 2		104,485		93,239
Mutual funds	Level 1		17,687		14,544

Financial Instruments Measured At Carrying Amount

The following table presents information about the Company’s financial instruments that are not carried at fair value at December 31, 2023 and 2022 (in thousands):

	December 31, 2023				December 31, 2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Liabilities:
2030 Notes		400,000		357,000		400,000		344,000