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SUBSEQUENT EVENTS (Detail) - Subsequent events - Lease agreement	Feb. 28, 2023 ft² $ / ft²
SUBSEQUENT EVENTS
Square feet of office space | ft²	41,427
Renewal term	5 years
Initial rate per square feet	24.75
Increase of initial rate	0.50

X

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980

+ Details

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

X

- 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

No definition available.

+ Details

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

X

- Definition

Per-share or per-unit amount of increase of initial rate per square feet.

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Area of office space square feet.

+ References

No definition available.

+ Details

Name:	zyxi_OfficeSpaceSquareFeet
Namespace Prefix:	zyxi_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Per-share or per-unit amount of payment of initial rate per square feet.

+ References

No definition available.

+ Details

Name:	zyxi_PaymentOfInitialRatePerSquareFeet
Namespace Prefix:	zyxi_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=zyxi_LeaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: