Leases - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) ft²	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) ft²	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Leases [Line Items]
Lessee, finance lease, lease not yet commenced, description			The Company does not currently have any finance leases or executed leases that have not yet commenced.
Operating lease, rent expense, net	$ 200	$ 200	$ 400	$ 400
Operating lease, weighted-average remaining lease term	4 years 7 months 6 days		4 years 7 months 6 days
Operating lease, weighted-average discount rate	7.20%		7.20%
Carrying amount of lease receivables	$ 1,900		$ 1,900
Unguaranteed residual assets	0		0
Operating lease income	40	50	100	100
Property and equipment, net	$ 2,108		$ 2,108		$ 1,991
NeuroStar Advanced Therapy Systems | Minimum
Leases [Line Items]
Lessor sales-type lease, Term	3 years		3 years
NeuroStar Advanced Therapy Systems | Maximum
Leases [Line Items]
Lessor sales-type lease, Term	4 years		4 years
Headquarters and Office Equipment, Including Copiers
Leases [Line Items]
Area of lease facility | ft²	32,000		32,000
Rental Equipment
Leases [Line Items]
Property and equipment, net	$ 400		$ 400		$ 400
Rental equipment depreciation expense	$ 20	$ 20	$ 40	$ 50
Charlotte, North Carolina
Leases [Line Items]
Area of lease facility | ft²	9,600		9,600