Summarized Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

The following table presents unaudited quarterly operating results for each of our last eight fiscal quarters. This information has been prepared on a basis consistent with our audited financial statements and includes all adjustments, consisting only of normal recurring adjustments, considered necessary for a fair presentation of the data.

Unaudited Quarterly Operating Results

	Three Months Ended
(In thousands, except for per share amounts)	March 31, 2019				June 30, 2019			September 30, 2019			December 31, 2019
Net sales	$	143,791			$	156,391		$	114,092		$	115,787
Gross profit	$	60,612			$	65,015		$	46,331		$	47,209
Operating income (loss)	$	(6,167	)		$	562		$	(20,288	)	$	(14,070	)
Net income (loss)	$	770			$	3,995		$	(46,123	)	$	(11,624	)
Earnings (loss) per common share - basic	$	0.02			$	0.08		$	(0.96	)	$	(0.25	)
Earnings (loss) per common share - diluted	$	0.02		⁽¹⁾	$	0.08	⁽¹⁾	$	(0.96	)	$	(0.25	)

	Three Months Ended
(In thousands, except for per share amounts)	March 31, 2018			June 30, 2018			September 30, 2018				December 31, 2018
Net sales	$	120,806		$	128,048		$	140,335			$	140,088
Gross profit	$	39,733		$	49,996		$	58,448			$	55,388
Operating income (loss)	$	(26,647	)	$	(12,813	)	$	(2,179	)		$	(3,783	)
Net income (loss)	$	(10,814	)	$	(7,670	)	$	7,589			$	(8,447	)
Earnings (loss) per common share - basic	$	(0.22	)	$	(0.16	)	$	0.16			$	(0.18	)
Earnings (loss) per common share - diluted	$	(0.22	)	$	(0.16	)	$	0.16		⁽¹⁾	$	(0.18	)

⁽¹⁾

^{Assumes exercise of dilutive securities calculated under the treasury stock method.}