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CAPITAL LEASES AND OTHER OBLIGATIONS (Details Textual) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Lease Termination Agreement And New Lease Agreement
Debt Instrument [Line Items]
Lease Commencement Date	Jan. 01, 2015
Fixed rental payments for each month	$ 49
Lease termination date	Dec. 31, 2016
Maximum
Debt Instrument [Line Items]
Imputed interest rate on lease	10.00%
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	$ 264

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

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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.

+ Details

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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

Fixed rental payments for each month.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

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

X

- Details

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Namespace Prefix:
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- Details

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