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Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Numerator: |  |
Net loss | $ (7,470) | $ (11,791)
Dividend on convertible exchangeable preferred shares | 201 | 200
Beneficial conversion feature of Series A convertible stock | 3,638 | 0
Conversion of Series A convertible preferred stock | 3,537 | 0
Net loss attributable to common shareholders | $ (14,846) | $ (11,991)
Denominator: |  |
Weighted average common shares outstanding (in shares) | 7,631,152 | 3,424,976
Loss per share - basic and diluted (in dollars per share) | $ (1.95) | $ (3.50)

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- Definition Value of convertible preferred stock that was converted to other securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
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