15. Basic and Diluted Loss per Common Share
The components of basic and diluted loss per share are as follows:
Year ended December 31,
202520242023
(In thousands, except share and per share amounts)
Earnings per share:
Net loss attributable to common stockholders$(12,912)$(6,524)$(16,343)
Net loss per share, basic and diluted$(0.43)$(0.24)$(0.64)
Weighted average number of common shares outstanding, basic and diluted29,996,861 27,209,698 25,612,724 
The following common share equivalents were excluded from the weighted average shares used to calculate diluted net loss per common share because their effects would have been anti-dilutive:
Year ended December 31,
202520242023
Stock options issued and outstanding67,297 79,238 97,480 
Restricted stock units issued and outstanding6,400,636 5,195,945 5,911,794 
Convertible senior notes1,522,858 2,321,106 3,442,229 
Total7,990,791 7,596,289 9,451,503 

About Earnings Per Share Disclosures

The earnings per share disclosure breaks down the calculation from net income to both basic and diluted EPS, revealing the full impact of a company's capital structure on per-share economics. The reconciliation between basic and diluted share counts exposes how many stock options, RSUs, convertible securities, and warrants are potentially dilutive to existing shareholders.

Key signals: a widening gap between basic and diluted shares indicates growing dilution from equity compensation or convertible instruments. Anti-dilutive securities excluded from the diluted calculation deserve attention — they represent latent dilution that will materialize if the stock price rises. Watch for the effect of share buybacks on per-share metrics: EPS growth driven primarily by repurchases rather than income growth signals weakening fundamentals. Compare year-over-year changes in the diluted share count against equity compensation expense to assess whether management is effectively managing dilution.