Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share

Earnings Per Share
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
For purposes of this calculation, stock warrants, outstanding stock options, convertible debt and unvested restricted shares are considered common stock equivalents using the treasury stock method, and are the only such equivalents outstanding. For all periods presented, all common stock equivalents outstanding were anti-dilutive.

The following table summarizes equivalent units outstanding that were excluded from the earnings per share calculation because their effects were anti-dilutive (in thousands):
  Three Months Ended September 30, Nine Months Ended September 30,
  2020 2019 2020 2019
Common stock purchase warrants 279  279  279  279 
Stock options 71  68  71  68 
Convertible Note   206    206 
Advance from NDX   98    98 
350  651  350  651