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Summary of Unaudited Quarterly Results of Operations Summary of Unaudited Quarterly Results of Operations (Tables)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Summary of unaudited quarterly results
Unaudited quarterly results of operations for the years ended December 31, 2015 and 2014 are summarized below:
 
(Dollars in thousands, except per share data)
 
2015 Quarter Ended
 
Dec. 31
 
Sep. 30
 
Jun. 30
 
Mar. 31
Net sales
$
64,961

 
$
70,243

 
$
70,726

 
$
69,904

Gross profit
39,091

 
43,342

 
43,808

 
42,883

 
 
 
 
 
 
 
 
Income (loss) from continuing operations (1)
$
(3,688
)
 
$
2,430

 
$
2,926

 
$
(1,371
)
Income from discontinued operations
—

 
—

 
—

 
—

Net income (loss)
$
(3,688
)
 
$
2,430

 
$
2,926

 
$
(1,371
)
 
 
 
 
 
 
 
 
Basic income (loss) per share of common stock:
 
 
 
 
 
 
 
Continuing operations
$
(0.42
)
 
$
0.28

 
$
0.34

 
$
(0.16
)
Discontinued operations
—

 
—

 
—

 
—

Net income (loss)
$
(0.42
)
 
$
0.28

 
$
0.34

 
$
(0.16
)
 
 
 
 
 
 
 
 
Diluted income (loss) per share of common stock:
 
 
 
 
 
 
 
Continuing operations (2)
$
(0.42
)
 
$
0.27

 
$
0.33

 
$
(0.16
)
Discontinued operations
—

 
—

 
—

 
—

Net income (loss) (2)
$
(0.42
)
 
$
0.27

 
$
0.33

 
$
(0.16
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Dollars in thousands, except per share data)
 
2014 Quarter Ended
 
Dec. 31
 
Sep. 30
 
Jun. 30
 
Mar. 31
Net sales
$
70,281

 
$
74,128

 
$
72,080

 
$
69,204

Gross profit
42,935

 
44,533

 
43,803

 
41,278

 
 
 
 
 
 
 
 
Income (loss) from continuing operations (3)
$
(2,997
)
 
$
460

 
$
798

 
$
(4,322
)
Income and gain from discontinued operations
325

 
—

 
—

 
1,367

Net income (loss)
$
(2,672
)
 
$
460

 
$
798

 
$
(2,955
)
 
 
 
 
 
 
 
 
Basic and diluted income (loss) per share of common stock:
 
 
 
 
 
 
 
Continuing operations
$
(0.34
)
 
$
0.05

 
$
0.09

 
$
(0.50
)
Discontinued operations (2)
0.03

 
—

 
—

 
0.16

Net income (loss) (2)
$
(0.31
)
 
$
0.05

 
$
0.09

 
$
(0.34
)

(1)
Loss from continuing operations for the three months ended December 31, 2015 includes an expense of $0.9 million related to an increase in the estimated future remediation cost of an environmental matter involving land owned in Decatur, Alabama, that was part of a division that was previously sold.

(2)
The sum of the quarterly earnings per share amounts may not equal the total annual earnings per share due to rounding and the uneven timing of earnings throughout the year compared to the weighted average shares outstanding.

(3)
Loss from continuing operations for the three months ended March 31, 2014 includes a $2.9 million impairment charge related to the Reno, Nevada distribution center.