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SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Purchased	$ 1,950	$ 1,643
Leased	4,872	3,377
Total Device revenue	$ 6,822	$ 5,020

X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	zyxi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	zyxi_RevenueFromDeivcesRelatingToLeased
Namespace Prefix:	zyxi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	zyxi_RevenueFromDeivcesRelatingToPurchased
Namespace Prefix:	zyxi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration