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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
NET REVENUE |  |  |
Product devices |  | $ 8,755 | $ 9,032
Product supplies |  | 14,677 | 4,281
Total revenue |  | 23,432 | 13,313
COSTS OF REVENUE AND OPERATING EXPENSES |  |  |
Costs of revenue - product & supply |  | 4,819 | 3,517
Selling, general and administrative expense |  | 9,669 | 9,156
Total costs of revenue and operating expenses |  | 14,488 | 12,673
Income from operations |  | 8,944 | 640
Other expense |  |  |
Other expense |  | 0 | (204)
Interest expense |  | (1,450) | (352)
Other expense |  | (1,450) | (556)
Income from operations before income taxes |  | 7,494 | 84
Income tax expense |  | 129 | 15
Net Income |  | 7,365 | 69
Plus: Net income (loss) - noncontrolling interest |  | 0 | 0
Net income - attributable to Zynex, Inc. | [1] | $ 7,365 | $ 69
Net income per share attributable to Zynex, Inc.: |  |  |
Basic |  | $ 0.23 | $ 0
Diluted |  | $ 0.22 | $ 0
Weighted average basic shares outstanding |  | 32,156 | 31,271
Weighted average diluted shares outstanding |  | 33,196 | 31,271
[1] | There is no difference between net income and comprehensive income.

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