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Leases - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
ft²
Mar. 31, 2022
USD ($)
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  
Operating lease, weighted-average remaining lease term 4 years 9 months 18 days    
Operating lease, weighted-average discount rate 7.20%    
Carrying amount of lease receivables $ 2,200    
Unguaranteed residual assets 0    
Operating lease income 40 50  
Property and equipment, net $ 1,990   $ 1,991
NeuroStar Advanced Therapy Systems | Minimum      
Leases [Line Items]      
Lessor sales-type lease, Term 3 years    
NeuroStar Advanced Therapy Systems | Maximum      
Leases [Line Items]      
Lessor sales-type lease, Term 4 years    
Headquarters and Office Equipment, Including Copiers      
Leases [Line Items]      
Area of lease facility | ft² 32,000    
Rental Equipment      
Leases [Line Items]      
Property and equipment, net $ 400   $ 400
Rental equipment depreciation expense $ 20 $ 30  
Charlotte, North Carolina      
Leases [Line Items]      
Area of lease facility | ft² 9,600