Revenue Recognition - Schedule of Revenue by Service Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 23,955	$ 20,551
Biologics and drug delivery
Disaggregation of Revenue [Line Items]
Total revenue	13,602	9,120
Biologics and Drug Delivery - Disposable Products
Disaggregation of Revenue [Line Items]
Total revenue	2,154	3,690
Biologics And Drug Delivery - Services And License Fees
Disaggregation of Revenue [Line Items]
Total revenue	11,448	5,430
Functional neurosurgery navigation and therapy
Disaggregation of Revenue [Line Items]
Total revenue	8,520	9,124
Functional Neurosurgery Navigation and Therapy - Disposable Products
Disaggregation of Revenue [Line Items]
Total revenue	7,589	7,587
Functional Neurosurgery Navigation and Therapy - Services
Disaggregation of Revenue [Line Items]
Total revenue	931	1,537
Capital equipment and software
Disaggregation of Revenue [Line Items]
Total revenue	1,833	2,307
Capital Equipment and Software - Systems and Software Products
Disaggregation of Revenue [Line Items]
Total revenue	860	1,512
Capital Equipment and Software - Services
Disaggregation of Revenue [Line Items]
Total revenue	$ 973	$ 795