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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
NET REVENUE    
Devices $ 1,588 $ 1,384
Supplies 5,288 2,052
Total Net revenue 6,876 3,436
COSTS OF REVENUE AND OPERATING EXPENSES    
Costs of revenue - device & supply 1,236 923
Selling, general and administrative expense 3,685 2,030
Total costs of revenue and operating expenses 4,921 2,953
Income from operations 1,955 483
Other expense    
Interest expense (115) (121)
Income from operations before income taxes 1,840 362
Income tax expense (benefit) (81) 9
Net Income 1,921 353
Plus: net loss - noncontrolling interest 0 0
Net income - attributable to Zynex, Inc. [1] $ 1,921 $ 353
Net income per share attributable to Zynex, Inc.:    
Basic $ 0.06 $ 0.01
Diluted $ 0.06 $ 0.01
Weighted average basic shares outstanding 32,601 31,418
Weighted average diluted shares outstanding 34,414 32,036
[1] There is no difference between net income and comprehensive income