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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Income Statement [Abstract] |  |
Net sales | $ 3,783 | $ 3,177
Cost of sales | 2,751 | 3,079
Gross profit | 1,032 | 98
Operating expenses: |  |
Product development | 282 | 526
Selling, general, and administrative | 2,027 | 2,241
Restructuring |  | 134
Total operating expenses | 2,295 | 2,901
Loss from operations | (1,263) | (2,803)
Other expenses (income): |  |
Interest expense | 133 | 43
Income from change in fair value of warrants | (873) | 0
Other expenses | 18 | 19
Net loss | $ (541) | $ (2,865)
Denominator: |  |
Net loss | $ (0.04) | $ (0.24)
Weighted average common shares outstanding: |  |
Basic and diluted | 15,430 | 12,126

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