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Note 13 - Net Loss Per Share | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Earnings Per Share [Text Block] |
( 13 ) | Net Loss per Share
The following table sets forth the computation of the basic and diluted net loss per share for the years ended December 31, 2018, 2017 and 2016 (in thousands, except share and per share data):
|  | Years ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (13,987 | ) |  | $ | (12,308 | ) |  | $ | (10,310 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares used to compute net loss per share, basic and diluted |  |  | 38,377,606 |  |  |  | 38,160,543 |  |  |  | 8,368,284 |
Net loss per share, basic and diluted |  | $ | (0.36 | ) |  | $ | (0.32 | ) |  | $ | (1.23 | )
The following weighted-average outstanding common stock equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have been antidilutive:
|  | December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Stock options to purchase common stock |  |  | 5,477,364 |  |  |  | 4,213,100 |  |  |  | 3,491,937 |
Unvested restricted stock units |  |  | 267,359 |  |  |  | 97,996 |  |  |  | - |
Common stock warrants |  |  | 2,666,666 |  |  |  | - |  |  |  | - |
Total |  |  | 8,411,389 |  |  |  | 4,311,096 |  |  |  | 3,491,937 |

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