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BASIS OF PRESENTATION (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Purchased	$ 488	$ 315	$ 713	$ 884
Leased	1,185	916	2,548	1,731
Total Device revenue	$ 1,673	$ 1,231	$ 3,261	$ 2,615

X

- Definition

Amount of revenue recognized from sale of devices during the year.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Amount of revenue recognized from sale of devices relating to lease during the year.

+ 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

Amount of revenue recognized from sale of devices relating to purchased during the year.

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	xbrli:monetaryItemType
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