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Net Loss Per Common Share
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Net Loss Per Common Share
Net Loss Per Common Share
 
The following reflects the net loss attributable to common shareholders and share data used in the basic and diluted earnings per share computations using the two class method: 
 
Three months ended March 31,
(Amounts in thousands except per share amounts)
2018
 
2017
Numerator:
 

 
 

Net loss
$
(7,659
)
 
$
(9,778
)
Denominator for basic and diluted EPS:
 

 
 

Weighted-average common shares outstanding
36,140

 
31,896

Net loss per share attributable to common shareholders (basic and diluted)
$
(0.21
)
 
$
(0.31
)

 
Common equivalent shares are not included in the diluted per share calculation where the effect of their inclusion would be anti-dilutive.  The aggregate number of common equivalent shares (related to options, warrants and preferred stock) that have been excluded from the computations of diluted net loss per common share at March 31, 2018 and 2017 were $6.2 million and $5.0 million, respectively.