Basic Loss per share is calculated by dividing the net loss by the weighted average number of outstanding common shares during the period. Diluted per share data included the dilutive effects of stock options and restricted stock units. Potential shares of 662,500 and 945,000 at December 31, 2020 and 2019, respectively, consist of options and restricted stock units. Computations of basic and diluted weighted average common shares outstanding are as follows: