XML 14 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 18, 2022
Jun. 30, 2021
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Period End Date Dec. 31, 2021    
Document Annual Report true    
Document Transition Report false    
Entity Registrant Name ZYNEX INC    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Security Exchange Name NASDAQ    
Title of 12(g) Security Common Stock, $0.001 par value per share    
Entity Interactive Data Current Yes    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Filer Category Non-accelerated Filer    
Entity Shell Company false    
Entity Public Float     $ 307.6
Entity Common Stock, Shares Outstanding   39,784,068  
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000846475    
Amendment Flag false    
Trading Symbol ZYXI    
Entity File Number 001-38804    
Entity Incorporation, State or Country Code NV    
Entity Tax Identification Number 90-0275169    
Entity Address, Address Line One 9655 Maroon Circle    
Entity Address, City or Town Englewood    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80112    
City Area Code 303    
Local Phone Number 703-4906    
ICFR Auditor Attestation Flag false    
Auditor Name Plante & Moran, PLLC    
Auditor Firm ID 166    
Auditor Location Denver, Colorado