Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share

Earnings Per Share
6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Basic loss per share of common stock is calculated by dividing net loss by the weighted-average shares outstanding for the period. Potentially dilutive shares, which are based on the weighted-average shares of common stock underlying outstanding stock-based awards and warrants using the treasury stock method, and convertible notes using the if-converted method, are included when calculating the diluted net loss per share of common stock when their effect is dilutive.

The following table presents the potentially dilutive shares that were excluded from the computation of diluted net loss per share of common stock, because their effect was anti-dilutive:

Three Months Ended June 30, Six Months Ended June 30,
2021 2020 2021 2020
Stock-based awards and warrants 3,827,804  24,294,118  3,827,804  24,294,118 
Convertible notes 5,667,328  9,958,506  5,667,328  12,488,899 

Excluded from the table above are the warrant shares related to the High Trail Convertible Note, which represented approximately 11.8 million and 13.3 million warrants calculated using the if-converted method for the three and six months ended June 30, 2020. The warrants were issuable at the option of the Company following the full or partial redemption of the High Trail Convertible Note. No warrants were issued in connection with the High Trail Convertible Note and it was fully converted during the year ended December 31, 2020.