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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
NET REVENUE    
Total revenue $ 31,917 $ 23,432
COSTS OF REVENUE AND OPERATING EXPENSES    
Costs of revenue - rental, product & supply 6,038 4,819
Selling, general and administrative expense 15,509 9,669
Total costs of revenue and operating expenses 21,547 14,488
Income from operations 10,370 8,944
Other expense    
Interest expense (154) (1,450)
Other expense (154) (1,450)
Income from operations before income taxes 10,216 7,494
Income tax expense 664 129
Net Income 9,552 7,365
Plus: Net income - noncontrolling interest 0 0
Net income - attributable to Zynex, Inc. $ 9,552 $ 7,365
Net income per share attributable to Zynex, Inc.:    
Basic $ 0.29 $ 0.23
Diluted $ 0.28 $ 0.22
Weighted average basic shares outstanding 32,503 32,156
Weighted average diluted shares outstanding 34,043 33,196
Devices [Member]    
NET REVENUE    
Total revenue $ 6,822 $ 5,020
Supplies [Member]    
NET REVENUE    
Total revenue $ 25,095 $ 18,412