Number of days volume weighted average price on specific date.

No definition available.

Name:	stim_DebtInstrumentNumberOfDaysVolumeWeightedAveragePriceOnSpecificDate
Namespace Prefix:	stim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of days volume weighted average price prior to closing date.

+ References

No definition available.

+ Details

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Namespace Prefix:	stim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the floating rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	stim_DebtInstrumentThresholdRateConsideredForCalculatingFloatingInterestRate
Namespace Prefix:	stim_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of liquidity covenant.

+ References

No definition available.

+ Details

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

- Definition

Line of credit facility prepayment fees percentage.

+ References

No definition available.

+ Details

Name:	stim_LineOfCreditFacilityPrepaymentFeesPercentage
Namespace Prefix:	stim_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Term loans number of tranches.

+ References

No definition available.

+ Details

Name:	stim_TermLoansNumberOfTranches
Namespace Prefix:	stim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which the class of warrant exercisable.

+ References

No definition available.

+ Details

Name:	stim_WarrantsExercisable
Namespace Prefix:	stim_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=stim_SolarCapitalLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=stim_PerceptiveCreditHoldingsIvLp.Member
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Period Type:

- Details

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- Details

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SUBSEQUENT EVENTS - Additional Information (Details) $ in Millions	Jul. 25, 2024 USD ($) D tranche shares	Mar. 29, 2023
SLR
SUBSEQUENT EVENTS
Prepayment fees percentage		2.00%
SLR \| Prepaid on or Before First Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage		3.00%
SLR \| Prepaid After First and on or Before Second Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage		2.00%
SLR \| Prepaid After Second Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage		1.00%
Subsequent Event \| SLR
SUBSEQUENT EVENTS
Line of credit facility, maximum borrowing capacity	$ 60.0
Subsequent Event \| Perceptive
SUBSEQUENT EVENTS
Line of credit facility, maximum borrowing capacity	$ 90.0
Term loans number of tranches \| tranche	3
Basis spread on variable rate	7.00%
Threshold rate considered for calculating floating interest rate	4.50%
Number of warrants issued \| shares	1,462,500
Number of days volume weighted average price prior to closing date \| D	10
Number of days volume weighted average price on specific date \| D	10
Liquidity covenant amount	$ 5.0
Subsequent Event \| Perceptive \| Prepaid on or Before First Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage	6.00%
Subsequent Event \| Perceptive \| Prepaid After First and on or Before Second Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage	5.00%
Subsequent Event \| Perceptive \| Prepaid After Second Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage	4.00%
Subsequent Event \| Perceptive \| Prepaid After the Third Anniversary of Funding
SUBSEQUENT EVENTS
Prepayment fees percentage	3.00%
Subsequent Event \| Perceptive, Tranche One
SUBSEQUENT EVENTS
Borrowings outstanding under credit facility	$ 50.0
Warrant exercisable \| shares	1,125,000
Subsequent Event \| Perceptive, Tranche Two
SUBSEQUENT EVENTS
Borrowings outstanding under credit facility	$ 15.0
Warrant exercisable \| shares	337,500
Subsequent Event \| Perceptive, Tranche Three
SUBSEQUENT EVENTS
Borrowings outstanding under credit facility	$ 25.0