Interest income generated from notes receivable.

No definition available.

Name:	stim_InterestIncomeNotesReceivable
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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Namespace Prefix:	stim_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Discount rate from market price.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Term of master sales agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	stim_
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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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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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Data Type:	xbrli:stringItemType
Balance Type:	na
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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for a borrowing supported by a written promise to pay an obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=stim_SecuredPromissoryNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=stim_SuccessTMSMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OtherNonoperatingIncomeExpenseMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Notes Receivables - Additional Information (Details) $ in Thousands				3 Months Ended		6 Months Ended
	Mar. 31, 2023 USD ($) D	Jul. 14, 2022 USD ($)	Sep. 29, 2021 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payment amount of notes receivable				$ 6,646		$ 6,646		$ 592
Greenbrook TMS Inc \| Secured Promissory Note
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of notes receivable	4 years
Interest rate (as a percent)	7.65%
Percentage of unpaid amount	200.00%
Discount rate	20.00%
Number of day volume-weighted average closing price \| D	30
Principal amount of notes receivable	$ 6,000
Success TMS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Repayment of notes issued		$ 10,500
Success TMS \| Secured Promissory Note
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of master sales agreement			5 years
Term of notes receivable			5 years
Principal amount of notes receivable			$ 10,000
Success TMS \| Secured Promissory Note \| Other income, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income recognized				$ 600	$ 400	$ 1,200	$ 600
Success TMS \| Secured Promissory Note \| Prime Rate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate (as a percent)			6.00%