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EARNINGS PER SHARE
 3 Months Ended
Mar. 25, 2020
Earnings Per Share [Abstract]  
EARNINGS PER SHARE EARNINGS (LOSS) PER SHARE
 
Basic earnings (loss) per share of Class A common stock is computed by dividing net income (loss) attributable to Shake Shack Inc. by the weighted-average number of shares of Class A common stock outstanding during the period. Diluted earnings (loss) per share of Class A common stock is computed by dividing net income (loss) attributable to Shake Shack Inc. by the weighted-average number of shares of Class A common stock outstanding adjusted to give effect to potentially dilutive securities.
The following table sets forth reconciliations of the numerators and denominators used to compute basic and diluted earnings (loss) per share of Class A common stock for the thirteen weeks ended March 25, 2020 and March 27, 2019.
 
 
 
Thirteen Weeks Ended
 
 
 
 
March 25
2020

 
March 27
2019

Numerator:
 
 
 
 
Net income (loss)
$
(1,079
)
 
$
3,607

 
Less: net income (loss) attributable to non-controlling interests
(119
)
 
1,061

 
Net income (loss) attributable to Shake Shack Inc.
$
(960
)
 
$
2,546

Denominator:
 
 
 
 
Weighted-average shares of Class A common stock outstanding—basic
34,444

 
29,563

 
Effect of dilutive securities:
 
 
 
 
 
Stock options
—

 
731

 
 
Performance stock units
—

 
76

 
 
Restricted stock units
—

 
22

 
Weighted-average shares of Class A common stock outstanding—diluted
34,444

 
30,392

 
 
 
 
 
 
Earnings (loss) per share of Class A common stock—basic
$
(0.03
)
 
$
0.09

Earnings (loss) per share of Class A common stock—diluted
$
(0.03
)
 
$
0.08


Shares of our Class B common stock do not share in the earnings or losses of Shake Shack and are therefore not participating securities. As such, separate presentation of basic and diluted earnings (loss) per share of Class B common stock under the two-class method has not been presented.
The following table presents potentially dilutive securities, as of the end of the period, excluded from the computations of diluted earnings (loss) per share of Class A common stock for the thirteen weeks ended March 25, 2020 and March 27, 2019.
 
 
 
Thirteen Weeks Ended
 
 
 
March 25
2020

 
March 27
2019

 
Stock options
847,207

(1)
3,785

(2)
Performance stock units
179,253

(1)
69,772

(3)
Restricted stock units
264,431

(1)
—

 
Shares of Class B common stock
3,117,002

(4)
7,453,515

(4)
(1)
Represents number of instruments outstanding at the end of the period that were excluded from the computation of diluted earnings per share of Class A common stock because the effect would have been anti-dilutive.
(2)
Number of securities excluded from the computation of diluted earnings per share of Class A common stock because the exercise price of the stock options exceeded the average market price of our Class A common stock during the period ("out-of-the-money").
(3) Excluded from the computation of diluted earnings per share of Class A common stock because the performance conditions associated with these awards were not met assuming the end of the reporting period was the end of the performance period.
(4) Shares of our Class B common stock outstanding as of the end of the period are considered potentially dilutive shares of Class A common stock. Amounts have been excluded from the computations of diluted earnings per share of Class A common stock because the effect would have been anti-dilutive under the if-converted and two-class methods.