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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

We compute basic net loss per share by dividing net loss attributable to our common stockholders by the weighted average number of shares of common stock outstanding during the period. We exclude all outstanding options and unvested restricted stock as such securities are anti-dilutive for all periods presented.

Basic and diluted net loss per share is calculated as follows (in thousands, except per share amounts): 
 
 
Three Months Ended
September 30,
 
Nine Months
Ended
September 30,
 
 
 
2019
 
2018
 
2019
 
2018
 
Net loss
 
$
(23,849
)
 
$
(15,454
)
 
$
(62,006
)
 
$
(43,971
)
 
Less net income attributable to non-controlling interests
 
21

 
25

 
63

 
75

 
Net loss attributable to shareholders
 
$
(23,870
)

$
(15,479
)
 
$
(62,069
)
 
$
(44,046
)
 
Weighted average shares outstanding, basic and diluted
 
23,671

 
20,206

 
23,703

 
19,968

 
Net loss per share, basic and diluted
 
$
(1.01
)
 
$
(0.77
)
 
$
(2.62
)
 
$
(2.21
)
 
Anti-dilutive securities excluded from diluted net loss per share calculation for stock-based compensation plans
 
1,920

 
1,065

 
1,920

 
1,065