| Computation of Net Loss Per Share of Common Stock The following table identifies the components of net loss per basic and diluted share (in thousands, except for per share data):
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Three Months Ended
March 31, |
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2021 |
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2020 |
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| Net loss per share – basic |
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| Net loss |
$ |
(4,450) |
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$ |
(2,672) |
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| Weighted average shares outstanding |
16,443 |
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13,552 |
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| Net loss per share – basic |
$ |
(0.27) |
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$ |
(0.20) |
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| Net loss per share – diluted |
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| Loss attributable to common shareholders: |
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| Net loss |
$ |
(4,450) |
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$ |
(2,672) |
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| Numerator effect of dilutive securities |
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| Warrants |
(357) |
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(166) |
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| Loss attributable to common shareholders |
$ |
(4,807) |
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$ |
(2,838) |
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| Weighted average shares outstanding – diluted: |
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| Weighted average shares outstanding – basic |
16,443 |
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13,552 |
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| Denominator effect of dilutive securities |
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| Warrants |
236 |
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37 |
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| Diluted potential common shares |
236 |
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37 |
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| Weighted average shares outstanding – diluted |
16,679 |
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13,589 |
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| Net loss per share – diluted |
$ |
(0.29) |
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$ |
(0.21) |
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Stock options, warrants and restricted stock units to acquire common shares that were excluded from the computation of diluted weighted-average common shares as their effect is anti-dilutive were as follows (in thousands):
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Three Months Ended
March 31, |
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2021 |
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2020 |
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| Stock options |
1,224 |
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1,056 |
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| Warrants |
— |
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414 |
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| Restricted stock units |
534 |
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125 |
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| Total anti-dilutive |
1,758 |
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1,595 |
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