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Net loss per share
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Net loss per share
Net loss per share

Earnings per share are calculated in accordance with ASC Topic 260, which specifies the computation, presentation and disclosure requirements for earnings per share (EPS).  It requires the presentation of basic and diluted EPS.  Basic EPS excludes all dilution and is based upon the weighted average number of shares of common stock outstanding during the period.  Diluted EPS reflects the potential dilution that would occur if convertible securities or other contracts to issue common stock were exercised. For the nine months ended September 30, 2019, there were 590,000 anti-dilutive stock options outstanding compared to zero as of September 30, 2018. The potential effect of the conversion feature with respect to the Notes (See Note 9 - Convertible Senior Notes) was excluded from the diluted net loss per share as of September 30, 2019 as the Company's closing stock price on June 28, 2019 (the last trading day before September 30, 2019) did not exceed the initial conversion price of $28.55 per share. The potential shares from the Notes at the initial conversion rate was approximately 2,801,736 and they were considered anti-dilutive using the if-converted method.

The following is a reconciliation of the weighted average of shares of common stock outstanding for the basic and diluted EPS computations (in thousands, except per share data):

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Net loss
$
(5,902
)
 
$
(16,704
)
 
$
(9,740
)
 
$
(17,959
)
 
 
 
 
 
 
 
 
Basic:
 

 
 

 
 

 
 

Shares outstanding at beginning of period
16,290

 
15,993

 
16,085

 
15,949

Weighted average shares issued/(repurchased) during the period, net
10

 
78

 
1

 
84

Weighted average common shares, basic
16,300

 
16,071

 
16,086

 
16,033

Net loss per common share, basic
$
(0.36
)
 
$
(1.04
)
 
$
(0.61
)
 
$
(1.12
)
Diluted:
 

 
 

 
 

 
 

Weighted average common shares, basic
16,300

 
16,071

 
16,086

 
16,033

Dilutive impact of stock options and restricted stock awards
—

 
—

 
—

 
—

Weighted average common shares, diluted
16,300

 
16,071

 
16,086

 
16,033

Net loss per common share, diluted
$
(0.36
)
 
$
(1.04
)
 
$
(0.61
)
 
$
(1.12
)