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Leases - Additional Information (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
ft²
Mar. 31, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
ft²
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
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 $ 200,000   $ 300,000 $ 200,000 $ 300,000  
Operating lease, weighted-average remaining lease term 7 years 7 months 6 days     7 years 7 months 6 days    
Operating lease, weighted-average discount rate 6.50%     6.50%    
Reimbursement of leasehold expenses   $ 800,000        
Carrying amount of lease receivables $ 3,400,000     $ 3,400,000    
Unguaranteed residual assets 0     0    
Operating lease income 100,000   100,000 200,000 300,000  
Property and equipment, net $ 828,000     $ 828,000   $ 1,107,000
NeuroStar Advanced Therapy Systems            
Leases [Line Items]            
Lessor sales-type lease, Term 3 years     3 years    
Headquarters and Office Equipment, Including Copiers            
Leases [Line Items]            
Area of lease facility | ft² 42,000     42,000    
Rental Equipment            
Leases [Line Items]            
Property and equipment, net $ 300,000     $ 300,000   $ 500,000
Rental equipment depreciation expense $ 20,000.00   $ 50,000.00 $ 50,000.00 $ 100,000