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Net Loss Per Share (Tables)
6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table sets forth the calculation of basic and diluted net income (loss) per share:
 
Three Months Ended
 
Six Months Ended
 
June 30, 2019
 
July 1, 2018
 
June 30, 2019
 
July 1, 2018
Basic net income (loss) per share:
 
 
 
 
 
 
 
Net income (loss)
$
(3,732
)
 
$
7,788

 
$
(15,201
)
 
$
4,686

Less: Income attributable to non-vested shares

 
(139
)
 

 
(83
)
Less: Income attributable to preferred stock

 
(1,596
)
 

 
(961
)
Net income (loss) available to common stockholders
$
(3,732
)
 
$
6,053

 
$
(15,201
)
 
$
3,642

Weighted average common shares outstanding
41,051,354

 
35,720,243

 
38,548,246

 
35,693,027

Basic net income (loss) per share
$
(0.09
)
 
$
0.17

 
$
(0.39
)
 
$
0.10

Diluted net income (loss) per share:
 
 
 
 
 
 
 
Net income (loss)
$
(3,732
)
 
$
7,788

 
$
(15,201
)
 
$
4,686

Shares used in computing basic net loss per share
41,051,354

 
35,720,243

 
38,548,246

 
35,693,027

Dilutive effect of preferred stock and non-vested shares

 
9,481,023

 

 
9,541,577

Shares used in computing diluted net loss per share
41,051,354

 
45,201,266

 
38,548,246

 
45,234,604

Diluted net income (loss) per share
$
(0.09
)
 
$
0.17

 
$
(0.39
)
 
$
0.10

Shares excluded from diluted net income (loss) per share computations (1)
17,755,355

 

 
17,755,355

 



(1) Shares issuable upon conversion of preferred stock and non-vested shares were excluded from the computation of diluted net loss per share because their effect would have been anti-dilutive.