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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Aug. 30, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Income Statement [Abstract] |  |  |  |  |
Sales |  | $ 3,672 | $ 2,651 | $ 10,760 | $ 6,576
Cost of sales |  | 1,151 | 738 | 3,490 | 2,314
Gross profit |  | 2,521 | 1,913 | 7,270 | 4,262
Other costs and expenses: |  |  |  |  |
Research and development |  | 613 | 487 | 1,890 | 1,600
Professional services |  | 628 | 421 | 1,815 | 1,291
Salaries and related costs |  | 2,170 | 1,826 | 5,785 | 6,016
Selling, general and administrative |  | 1,898 | 2,012 | 6,221 | 6,003
Total other costs and expenses |  | 5,309 | 4,746 | 15,711 | 14,910
Loss from operations |  | (2,788) | (2,833) | (8,441) | (10,648)
Interest income (expense), net |  | 105 | (36) | 33 | (103)
Other losses |  | (868) | 0 | (868) | 0
Change in fair value of derivative liabilities |  | 0 | (69) | 20 | 57
Total other expense, net |  | (763) | (105) | (815) | (46)
Loss from continuing operations before income taxes |  | (3,551) | (2,938) | (9,256) | (10,694)
Income tax (benefit) expense |  | (2,408) | 6 | (2,384) | 15
Net loss from continuing operations |  | (1,143) | (2,944) | (6,872) | (10,709)
Income from discontinued operations, net of tax |  | 540 | 1,699 | 5,062 | 6,471
Gain on sale of the Core Business, net of tax | $ 69,072 | 69,072 | 0 | 69,072 | 0
Total income from discontinued operations, net of tax |  | 69,612 | 1,699 | 74,134 | 6,471
Net income (loss) |  | $ 68,469 | $ (1,245) | $ 67,262 | $ (4,238)
Loss per share from continuing operations |  |  |  |  |
Loss per share from continuing operations, basic |  | $ (0.03) | $ (0.09) | $ (0.21) | $ (0.35)
Loss per share from continuing operations, diluted |  | (0.03) | (0.09) | (0.21) | (0.35)
Income per share from discontinued operations |  |  |  |  |
Income per share from discontinued operations, basic |  | 2.09 | 0.05 | 2.25 | 0.21
Income per share from discontinued operations, diluted |  | 1.99 | 0.05 | 2.19 | 0.21
Income (loss) per share |  |  |  |  |
Income (loss) per share, basic |  | 2.06 | (0.04) | 2.04 | (0.14)
Income (loss) per share, diluted |  | $ 1.96 | $ (0.04) | $ 1.98 | $ (0.14)
Weighted average number of shares outstanding - basic (in shares) |  | 33,275 | 31,078 | 33,014 | 30,932
Weighted average number of shares outstanding - dilutive (in shares) |  | 34,934 | 31,078 | 33,952 | 30,932

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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1377-109256 + Details
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