Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Mar. 22, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	ZYNEX INC
Entity Central Index Key	0000846475
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Amendment Flag	false
Trading Symbol	ZYXI
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float		$ 4,195,570
Entity Common Stock, Shares Outstanding		31,271,234