NOTE 12 —Net Loss Per Share Attributable to Common Stockholders

Net loss per share attributable to common stockholders for the years ended December 31, 2019 and 2018, was determined by decreasing Net income or increasing Net loss for the years then ended by the number of cumulative dividends, not yet declared, on the Company's previously outstanding convertible preferred stock. The following table sets forth the computation of the Company’s basic and diluted net loss per share attributable to common stockholders for the periods ended:

The potentially dilutive common shares that were excluded from the calculation of diluted net loss per share because their effect would have been antidilutive for the periods ended: