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EARNINGS PER SHARE
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE
A summary of the numerator and denominators used in the computation of earnings per share is as follows:
 
Fiscal Year Ended
December 31,
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net income (loss) attributable to common stockholders
$
6,420

 
$
(21,799
)
 
$
(6,849
)
Denominator:
 
 
 
 
 
Class A common stock
41,944

 
41,298

 
40,572

Class B common stock
988

 
988

 
988

Shares to be issued - acquisition
103

 
—

 
—

Unvested restricted stock
(9
)
 
(38
)
 
(88
)
Effect of weighted average shares outstanding
(338
)
 
(402
)
 
(239
)
Basic weighted average common shares outstanding
42,688

 
41,846

 
41,233

Impact of potentially dilutive securities:
 
 
 
 
 
Dilutive effect of stock options and stock awards
1,480

 
—

 
—

Diluted weighted average common shares outstanding
44,168

 
41,846

 
41,233

Antidilutive potentially issuable shares
2

 
2,219

 
2,442