EARNINGS (LOSS) PER SHARE

9 Months Ended

Sep. 30, 2020

EARNINGS (LOSS) PER SHAREBasic earnings (loss) per share is computed by dividing net income (loss) by the weighted average number of shares outstanding during the period. For periods in which the Company reports net income, diluted net earnings per share is determined by using the weighted average number of common and dilutive common equivalent shares outstanding during the period unless the effect is antidilutive.

The calculations of shares used to compute earnings (loss) per share were as follows (in thousands):


	Three months ended		Nine months ended
	September 30, 2020	September 30, 2019	September 30, 2020	September 30, 2019
Weighted average shares outstanding—basic	144,948	110,080	136,837	109,523
Potential dilutive common shares	6,732	676	—	577
Weighted average shares outstanding—diluted	151,680	110,756	136,837	110,100

Options to purchase the Company's common stock aggregating 0.2 million shares have not been included in the computation of diluted earnings per share for the three months ended September 30, 2020 because their effect would have been antidilutive. Options to purchase the Company's common stock and unvested shares of restricted and performance-based stock and stock units aggregating 13.5 million shares have not been included in the computation of diluted loss per share for the nine months ended September 30, 2020 because their effect would have been antidilutive. Options to purchase the Company's common stock aggregating 0.3 million shares have not been included in the computation of diluted earnings per share for both the three and nine months ended September 30, 2019 because their effect would have been antidilutive.