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Net Loss Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | Basic and diluted loss per share were calculated using the following:
|  | Year ended December 31, |
In Thousands, Except Share Data and Per Share Amounts |  | 2020 |  |  | 2019 |  |  | 2018 |
Net loss |  | $ | (44,836 | ) |  | $ | (39,612 | ) |  | $ | (27,897 | )
Weighted average shares outstanding - basic and diluted |  |  | 33,882,406 |  |  |  | 32,805,684 |  |  |  | 30,683,421 |
Basic and diluted loss per share |  | $ | (1.32 | ) |  | $ | (1.21 | ) |  | $ | (0.91 | )
|  | Year ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Anti-dilutive stock options, restricted stock units and performance stock units |  |  | 5,522,418 |  |  |  | 5,606,552 |  |  |  | 4,253,301 |

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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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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