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NET INCOME (LOSS) PER COMMON SHARE
6 Months Ended
Jun. 30, 2020
NET INCOME (LOSS) PER COMMON SHARE  
NET INCOME (LOSS) PER COMMON SHARE

2.           NET INCOME (LOSS) PER COMMON SHARE

Basic net income (loss) per common share for the three and six month periods ended June 30, 2020 and 2019 is based on the weighted-average number of shares of common stock outstanding during the periods. Diluted loss per share is based on the weighted-average number of shares of common stock outstanding during each period in which a loss is incurred. Potentially dilutive shares are excluded because the effect is antidilutive. In periods where there is net income, diluted income per share is based on the weighted-average number of shares of common stock outstanding plus dilutive securities with a purchase or conversion price below the per share price of our common stock on the last day of the reporting period. The potentially dilutive securities include 31,269,884 shares and 31,175,178 shares in 2020 and 2019, respectively, reserved for the conversion of convertible debt or exercise of outstanding options and warrants.