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Supplementary Financial Information to Item 8. (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Data |
2018 |  | Fourth Quarter |  | Third Quarter |  | Second Quarter |  | First Quarter
Net sales |  | $ | 3,118 |  |  | $ | 5,158 |  |  | $ | 5,172 |  |  | $ | 4,659 |
Gross profit |  | 19 |  |  | 1,281 |  |  | 1,296 |  |  | 816 |
Net loss |  | (3,000 | ) |  | (1,920 | ) |  | (1,801 | ) |  | (2,390 | )
Net loss per share (basic and diluted) |  | $ | (0.25 | ) |  | $ | (0.16 | ) |  | $ | (0.15 | ) |  | $ | (0.20 | )
2017 |  | Fourth Quarter |  | Third Quarter |  | Second Quarter |  | First Quarter
Net sales |  | $ | 4,727 |  |  | $ | 5,002 |  |  | $ | 6,011 |  |  | $ | 4,106 |
Gross profit |  | 1,622 |  |  | 1,137 |  |  | 1,501 |  |  | 561 |
Net loss |  | (1,858 | ) |  | (1,773 | ) |  | (3,114 | ) |  | (4,522 | )
Net loss per share (basic and diluted) |  | $ | (0.16 | ) |  | $ | (0.15 | ) |  | $ | (0.26 | ) |  | $ | (0.39 | )

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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