LEASES (Details) $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($) ft²	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
LEASES
Operating lease, rent expense, net	$ 9,500	$ 1,000	$ 800
Operating lease, weighted-average remaining lease term	5 years 7 months 6 days
Operating lease, weighted-average discount rate	12.20%
Carrying amount of lease receivables	$ 300	300
Unguaranteed residual assets	0	0
Operating lease income	$ 200	$ 100	$ 200
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Revenue from Contract with Customer, Excluding Assessed Tax	Revenue from Contract with Customer, Excluding Assessed Tax	Revenue from Contract with Customer, Excluding Assessed Tax
Property and equipment, net	$ 4,466	$ 6,242
NeuroStar Advanced Therapy Systems \| Minimum
LEASES
Lessor sales-type lease, Term	2 years
NeuroStar Advanced Therapy Systems \| Maximum
LEASES
Lessor sales-type lease, Term	4 years
Headquarters and Office Equipment, Including Copiers
LEASES
Area of lease facility \| ft²	42,000
Lessee, operating lease, extended maturity period	2033-06
Combined area of lease facility \| ft²	32,000
Rental Equipment
LEASES
Property and equipment, net	$ 100	300
Rental equipment depreciation expense	$ 60	$ 90	$ 90
Charlotte, North Carolina
LEASES
Area of lease facility \| ft²	9,600
Description of option to extend lease facility	true
Lessee, operating lease, renewal term	1 year

Aggregate area of lease facility.

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Area of lease facility.

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Leases.

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Lessee operating lease extended date of maturity month and year.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessor's sales-type lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of operating lease expense. Excludes sublease income.

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Indicates line item in statement of income or comprehensive income that includes operating lease income.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Present value of lease payments not yet received by lessor and amount expected to be derived from underlying asset, following end of lease term guaranteed by lessee or other third party unrelated to lessor, from sales-type lease.

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Present value expected to be derived from underlying asset following end of lease term not guaranteed by lessee or other third party unrelated to lessor.

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