Interest income generated from notes receivable.

No definition available.

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Namespace Prefix:	stim_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The principal amount of notes receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	stim_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Term of notes receivable.

+ References

No definition available.

+ Details

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- Definition

Discount rate from market price.

+ References

No definition available.

+ Details

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- Definition

Percentage of unpaid amount of outstanding's on default to be issued warrants.

+ References

No definition available.

+ Details

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- Definition

Threshold number of trading days to calculate volume-weighted average closing price.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Percentage added to reference rate used to compute variable rate on loan receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(5)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

Name:	srt_StatementScenarioAxis=stim_IfMakerSCommonSharesAreTradedOnStockMarketsOtherThanNasdaqMember
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Data Type:	na
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- Details

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- Details

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- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OtherNonoperatingIncomeExpenseMember
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NOTES RECEIVABLE - Additional Information (Details) - Secured Promissory Note $ in Millions		3 Months Ended		9 Months Ended
	Mar. 31, 2023 USD ($) D	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
If Maker's Common Shares Are Not Traded On Any Stock Markets
NOTES RECEIVABLE
Discount rate	20.00%
Greenbrook TMS Inc
NOTES RECEIVABLE
Principal amount of notes receivable	$ 6.0
Term of notes receivable	4 years
Notes receivable outstanding		$ 4.0		$ 4.0		$ 5.2
Percentage of unpaid amount	200.00%
Greenbrook TMS Inc \| If Maker's Common Shares Are Traded On Nasdaq Stock Market
NOTES RECEIVABLE
Discount rate	20.00%
Number of day volume-weighted average closing price \| D	30
Greenbrook TMS Inc \| If Maker's Common Shares Are Traded On Stock Markets Other Than Nasdaq
NOTES RECEIVABLE
Discount rate	20.00%
Number of day volume-weighted average closing price \| D	30
Greenbrook TMS Inc \| Secured Overnight Financing Rate
NOTES RECEIVABLE
Interest rate (as a percent)	7.65%
Success TMS \| Other income, net
NOTES RECEIVABLE
Interest income recognized		$ 0.1	$ 0.2	$ 0.5	$ 0.4