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Consolidated Statement of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Net revenue:    
Rental $ 8,917 $ 9,892
Sales 30,749 24,256
Total net revenue 39,666 34,148
Cost of revenue:    
Rental 1,283 1,842
Sales 7,487 5,529
Total cost of revenue 8,770 7,371
Gross profit 30,896 26,777
Selling, general and administrative expense 28,159 23,676
Income from operations 2,737 3,101
Other income (expense):    
Interest income 3 1
Interest expense and loss on extinguishment of debt (435) (460)
Other income (expense) 31 2
Total other income (expense) (401) (457)
Income before income taxes 2,336 2,644
Income tax expense 788 1,080
Net income 1,548 1,564
Plus: Net loss - noncontrolling interest 5  
Net income - attributable to Zynex, Inc. $ 1,553 $ 1,564
Net income per share - attributable to Zynex, Inc.:    
Basic $ 0.05 $ 0.05
Diluted $ 0.05 $ 0.05
Weighted average number of common shares outstanding:    
Basic 31,062,428 30,750,108
Diluted 31,222,126 30,978,288