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NONCONTROLLING INTEREST (Details) - Non-wholly owned entities	9 Months Ended
	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

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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

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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

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

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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Namespace Prefix:
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