Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Sales	$ 5,191	$ 10,102	$ 18,331	$ 29,072
Gross profit	3,645	7,886	12,711	23,257
Total assets	23,359	26,193	23,359	26,193	25,936
Reporting Segments | Zynex Medical
Segment Reporting Information [Line Items]
Sales	5,138	10,003	18,102	28,845
Gross profit	3,612	7,834	12,570	23,119
Total assets	22,361	25,494	22,361	25,494
Reporting Segments | Zynex NeuroDiagnostics
Segment Reporting Information [Line Items]
Sales	53	99	229	227
Gross profit	33	52	141	138
Total assets	986	692	986	692
Reporting Segments | Zynex Monitoring Solutions
Segment Reporting Information [Line Items]
Sales	0	0	0	0
Gross profit	0	0	0	0
Total assets	$ 12	$ 7	$ 12	$ 7