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Summary of Significant Accounting Policies (Net Loss Per Share) (Tables) | 12 Months Ended
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Dec. 31, 2018
Contract with Customer, Asset, Net, Current, Percent Change |
Net Income (Loss) Per Share (Tables) | The components of basic and diluted net loss per share were as follows (in thousands, except loss per share data):
|  |  | Year Ended December 31,
Numerator: |  |  | 2018 |  |  | 2017
Net loss available for common shareholders |  | $ | (27,250) |  | $ | (25,486)
Denominator: |  |  |  |  |  |
Weighted-average common shares outstanding |  |  | 86,983 |  |  | 72,786
Net loss per share - basic and diluted |  | $ | (0.31) |  | $ | (0.35)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The shares shown represent the number of shares of common stock which would be issued upon conversion in the respective years shown below (in thousands):
|  |  | Year Ended December 31,
|  |  | 2018 |  |  | 2017
Options outstanding and warrants exercisable |  |  | 6,619 |  |  | 7,007
Nonvested restricted stock units |  |  | 1,149 |  |  | 185
|  |  | 7,768 |  |  | 7,192

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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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