Unaudited quarterly financial data

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Unaudited quarterly financial data

16. Unaudited quarterly financial data

Set forth below are the unaudited quarterly financial data for the fiscal years ended December 31, 2015 and 2014:

For the quarters ended	March 31			June 30			September 30			December 31
2015
Net sales	$	86,139		$	94,629		$	112,008		$	96,670
Cost of sales		69,682			77,255			96,700			82,975
Gross profit		16,457			17,374			15,308			13,695
Operating expenses		12,387			12,899			13,920			14,433
Operating income (loss)		4,070			4,475			1,388			(738	)
Other (income) expense		4,142			(1,731	)		(7,255	)		149
Income (loss) before income taxes		(72	)		6,206			8,643			(887	)
Income tax provision (benefit)		1,384			1,285			(466	)		(2,591	)
Net income (loss)	$	(1,456	)	$	4,921		$	9,109		$	1,704
Net income (loss) per common share:
Basic	$	(0.13	)	$	0.46		$	0.84		$	0.16
Diluted	$	(0.13	)	$	0.18		$	0.03		$	0.04

For the quarters ended	March 31			June 30			September 30			December 31
2014
Net sales	$	66,735		$	83,378		$	93,972		$	103,910
Cost of sales		54,805			67,982			75,344			82,819
Gross profit		11,930			15,396			18,628			21,091
Operating expenses		8,409			9,503			11,109			11,980
Operating income		3,521			5,893			7,519			9,111
Other (income)		(111	)		(240	)		(3,625	)		(4,519	)
Income before income taxes		3,632			6,133			11,144			13,630
Income tax provision		1,258			2,250			3,996			3,309
Net income	$	2,374		$	3,883		$	7,148		$	10,321
Net income per common share:
Basic	$	0.23		$	0.37		$	0.66		$	0.96
Diluted	$	0.19		$	0.34		$	0.56		$	0.48