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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
Name: | zyxi_RevenueFromDeivces
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