Loss Per Common Share

3 Months Ended

Mar. 31, 2017

Basic and diluted loss per common share is determined in accordance with the applicable provisions of U.S. GAAP. Basic loss per common share is computed using the weighted average number of shares of common stock outstanding for the period. Diluted loss per common share is equivalent to basic loss per common share, as U.S. GAAP provides that a loss cannot be diluted by potential common stock, which includes the potential exercise of stock options under our share based employee compensation plans and vesting of our restricted stock/restricted stock units.

For the three months ended March 31, 2017 and 2016, options to purchase common stock and unvested restricted stock units estimated to be 3.4 million and 3.0 million shares, respectively, were excluded from the computation of diluted loss per common share as their effect would be anti-dilutive. These shares could dilute earnings per common share in the future.

A reconciliation of basic loss per common share to diluted loss per common share is as follows (in thousands, except per share data):



	Three Months Ended March 31,
	2017			2016
Net loss—basic and diluted	$	(4,802	)	$	(4,266	)

Weighted average common shares outstanding—basic	23,675			22,887
Dilutive effect of common stock equivalents	—			—
Weighted average common shares outstanding—diluted	23,675			22,887

Net loss per common share—basic and diluted	$	(0.20	)	$	(0.19	)