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BASIS OF PRESENTATION (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Purchased	$ 547	$ 304	$ 1,260	$ 1,189
Leased	1,264	841	3,812	2,571
Total Device revenue	$ 1,811	$ 1,145	$ 5,072	$ 3,760

X

- Definition

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

+ References

No definition available.

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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
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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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