Annual report pursuant to Section 13 and 15(d)

Net Loss Per Share

Net Loss Per Share
12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Net Loss Per Share



    December 31,  
Basic and diluted loss per share   2017     2018     2019  
Net loss attributable to common stockholders   $ (3,870 )   $ (5,812 )   $ (12,047 )
Weighted-average common shares outstanding - basic and diluted     14,961       17,233       20,476  
Net loss attributable to common stockholders - basic and diluted   $ (0.26 )   $ (0.34 )   $ (0.59 )


Basic loss per share is calculated by dividing net loss attributable to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted loss per share reflects the potential dilution assuming common shares were issued upon the exercise of outstanding options and the proceeds thereof were used to purchase outstanding common shares. Dilutive potential common shares include outstanding stock options, warrants and restricted stock and performance share awards. We include participating securities (unvested share-based payment awards and equivalents that contain non-forfeitable rights to dividends or dividend equivalents) in the computation of EPS pursuant to the two-class method. Our participating securities consist solely of preferred stock, which have contractual participation rights equivalent to those of stockholders of unrestricted common stock. The two-class method of computing earnings per share is an allocation method that calculates earnings per share for common stock and participating securities. During periods of net loss, no effect is given to the participating securities because they do not share in the losses of the Company. For the years ended December 31, 2017, 2018 and 2019, the basic and diluted weighted-average shares outstanding are the same, since the effect from the potential exercise of outstanding stock options, conversion of preferred stock and convertible note payable, and vesting of restricted stock and restricted stock units totaling 1,831, 1,788 and 12,865, respectively, would have been anti-dilutive due to the loss.