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Net Loss Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the reconciliation of the numerator and denominator used in the computation of basic and diluted net loss per common share for the three and six-months ended June 30, 2018 and 2017:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in thousands, except per share amounts) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss used for basic earnings per share |  | $ | (869 | ) |  | $ | (3,451 | ) |  | $ | (3,474 | ) |  | $ | (6,456 | )
Less change in fair value of warrant liability |  |  | — |  |  |  | (190 | ) |  |  | — |  |  |  | (612 | )
Net loss used for diluted earnings per share |  | $ | (869 | ) |  | $ | (3,641 | ) |  | $ | (3,474 | ) |  | $ | (7,068 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average outstanding common shares |  |  | 21,204 |  |  |  | 21,204 |  |  |  | 21,204 |  |  |  | 21,199 |
Effect of dilutive potential common shares resulting from options |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2 |
Effect of dilutive potential common shares resulting from warrants |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Weighted-average shares outstanding—diluted |  |  | 21,204 |  |  |  | 21,204 |  |  |  | 21,204 |  |  |  | 21,201 |
Net loss per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.04 | ) |  | $ | (0.16 | ) |  | $ | (0.16 | ) |  | $ | (0.30 | )
Diluted |  | $ | (0.04 | ) |  | $ | (0.17 | ) |  | $ | (0.16 | ) |  | $ | (0.33 | )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | These are excluded from the calculation due to their anti-dilutive effect for the three and six-months ended June 30, 2018 and 2017:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Weighted-average anti-dilutive common shares resulting from options |  |  | 3,658 |  |  |  | 2,437 |  |  |  | 3,327 |  |  |  | 2,324 |
Weighted-average anti-dilutive common shares resulting from warrants |  |  | 1,482 |  |  |  | 1,117 |  |  |  | 1,730 |  |  |  | 517 |
|  |  | 5,140 |  |  |  | 3,554 |  |  |  | 5,057 |  |  |  | 2,841 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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