FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) $ in Thousands	Sep. 30, 2024 USD ($)
FAIR VALUE OF FINANCIAL INSTRUMENTS
Contingent consideration	$ 0

Fair value portion of contingent consideration from business acquisition.

No definition available.

Name:	zyxi_ContingentConsiderationFairValueDisclosure
Namespace Prefix:	zyxi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant