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Unaudited Condensed Consolidated Financial Statements and Management's Plans (Details Textual) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2015 subsidiary	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	May 07, 2015
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of active subsidiaries	3zyxi_NumberOfActiveSubsidiaries
Net (loss) income	$ (896,000)us-gaap_NetIncomeLoss		$ (1,430,000)us-gaap_NetIncomeLoss	$ (6,199,000)us-gaap_NetIncomeLoss	$ (7,301,000)us-gaap_NetIncomeLoss
Line of credit current borrowing capacity	0us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Total net revenue	3,183,000us-gaap_SalesRevenueNet	2,196,000us-gaap_SalesRevenueNet	3,167,000us-gaap_SalesRevenueNet
Percentage increase in net revenue	45.00%zyxi_PercentageIncreaseDecreaseInNetRevenue
Subsequent Event
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Line of Credit						$ 4,767,000us-gaap_LineOfCredit / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
ZBC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Equity Method Investment, Ownership Percentage	80.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / dei_LegalEntityAxis = zyxi_ZynexBillingAndConsultingLLCMember

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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