Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Summary of Unaudited Quarterly Results of Operations

The following summarizes the unaudited quarterly results of operations for the years ended December 31, 2015 and 2014.

	Year ended December 31, 2015
	March 31		June 30		Sept. 30			Dec. 31
Net sales	$	163,746	$	164,856	$	154,824		$	183,854
Income from operations	$	13,934	$	13,589	$	10,122		$	(10,848	)
Net income	$	6,001	$	6,953	$	4,630		$	(25,015	)
Basic net income per share	$	0.32	$	0.36	$	0.17		$	(0.93	)
Diluted net income per share	$	0.31	$	0.36	$	0.17		$	(0.93	)
Weighted average shares outstanding:
Basic number of shares		18,996		19,215		26,839			26,840
Effect of dilutive stock options		384		367		328			—
Diluted number of shares		19,380		19,582		27,167			26,840
	Year ended December 31, 2014
	March 31		June 30		Sept. 30			Dec. 31
Net sales	$	102,528	$	106,680	$	125,632		$	153,761
Income from operations	$	8,338	$	8,237	$	2,552		$	8,560
Net income	$	5,238	$	5,200	$	(3,840	)	$	1,619
Basic net income per share	$	0.30	$	0.29	$	(0.21	)	$	0.09
Diluted net income per share	$	0.29	$	0.29	$	(0.21	)	$	0.08
Weighted average shares outstanding:
Basic number of shares		17,656		17,779		17,979			18,970
Effect of dilutive stock options		306		393		—			347
Diluted number of shares		17,962		18,172		17,979			19,317