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NONCONTROLLING INTEREST (Details) - Non-wholly owned entities | 9 Months Ended
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Sep. 30, 2025 entity
NONCONTROLLING INTEREST |
Number of non-wholly owned entities | 22
Percentage of financial results of these subsidiaries included in the consolidated financial results | 100.00%
Minimum |
NONCONTROLLING INTEREST |
Non-controlling interest percentage | 10.00%
Maximum |
NONCONTROLLING INTEREST |
Non-controlling interest percentage | 49.00%

X
- Definition Percentage of financial results of these subsidiaries included in the Company's consolidated financial results. + References No definition available. + Details
Name: | stim_FinancialResultsOfSubsidiaryIncludedInConsolidatedFinancialResultsPercent
Namespace Prefix: | stim_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of affiliated entities of the reporting entity as of the period end date. + References No definition available. + Details
Name: | stim_NumberOfAffiliatedEntities
Namespace Prefix: | stim_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_MinorityInterestLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_OwnershipAxis=stim_NonWhollyOwnedSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |