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Organization, Nature of Business and Management's Plans (Details Textual) (USD $)
 12 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Oct. 31, 2014
Mar. 19, 2015
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Percentage of limited liability 80.00%us-gaap_MinorityInterestOwnershipPercentageByParent      
Total net revenue $ 11,117,000us-gaap_SalesRevenueNet $ 21,684,000us-gaap_SalesRevenueNet    
Net (loss) income (6,199,000)us-gaap_NetIncomeLoss (7,301,000)us-gaap_NetIncomeLoss    
Line of credit current borrowing capacity 0us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity      
Fixed expenses reduced by cutting annual employee costs through headcount reduction 7,000,000zyxi_EffectOfHeadcountReductionsOnEmployeeCosts      
Operating Leases Rent Expense Minimum Rentals 129,000us-gaap_OperatingLeasesRentExpenseMinimumRentals      
Line of Credit       4,497,000us-gaap_LineOfCredit
Current Lease Agreement        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Future monthly base rental payments 43,000zyxi_FutureMonthlyBaseRentalPayments
/ us-gaap_LeaseArrangementTypeAxis
= zyxi_CurrentLeaseAgreementMember		      
Lease agreement description Under the terms of the termination agreement, among other things, the existing headquarters building lease terminated on December 31, 2014; the Company agreed to consolidate its operations into approximately one-third of the total square footage it occupied previously; monthly rental payments were reduced from approximately $129 to $43 for the period from September 1, 2014 through December 31, 2014      
Revised from September 1, 2014 through December 31, 2014        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Future monthly base rental payments     49,000zyxi_FutureMonthlyBaseRentalPayments
/ us-gaap_LeaseArrangementTypeAxis
= zyxi_NewLeaseAgreementMember		  
Lease term 2 years   2 years  
Lease Commencement Date Jan. 01, 2015   Jan. 01, 2015  
Lease agreement description the terms of the new lease took effect January 1, 2015. The terms of the new lease agreement include, among other things, a term of two years, fixed monthly base rental payments of approximately $49. The Company is monitoring the demand for its ZMI electrotherapy products and will make additional expense adjustments as necessary in future periods.      
Zynex Billing and Consulting, LLC        
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]        
Total net revenue $ 411,000us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= zyxi_ZynexBillingAndConsultingLimitedLiabilityCapitalMember		 $ 262,000us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= zyxi_ZynexBillingAndConsultingLimitedLiabilityCapitalMember