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CAPITAL LEASES AND OTHER OBLIGATIONS (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Lease Termination Agreement And New Lease Agreement
Debt Instrument [Line Items]
Lease Commencement Date	Jan. 01, 2015
Lease term	2 years
Fixed rental payments for each month	$ 49
Lease Initiation Date	Oct. 31, 2014
Lease agreement written notice to company, terms	6 months
Lease agreement written notice to landlord, terms	3 months
Maximum
Debt Instrument [Line Items]
Imputed interest rate on lease	10.00%
Maximum | Lease Termination Agreement And New Lease Agreement
Debt Instrument [Line Items]
Lease termination date	Dec. 31, 2016
Minimum
Debt Instrument [Line Items]
Imputed interest rate on lease	5.00%
Assembly Equipment
Debt Instrument [Line Items]
Cost of assets under capital lease	$ 461
Accumulated depreciation	$ 218

X

- Definition

Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 2)
-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

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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.

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X

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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

X

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Fixed rental payments for each month.

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Imputed interest rate on capital lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lease commencement date.

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

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- Definition

Lease initiation date.

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum period of written notice to landlord for termination agreement.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Minimum period of written notice to termination agreement.

+ References

No definition available.

+ Details

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X

- Details

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- Details

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