SUPPLEMENTAL QUARTERLY INFORMATION (UNAUDITED)

The following table represents the significant items for the results of operations on a quarterly basis for the years ended December 31, 2017 and 2016:



	Three Months Ended March 31, 2017			Three Months Ended June 30, 2017			Three Months Ended September 30, 2017			Three Months Ended December 31, 2017
Revenues	$	418,893		$	535,103		$	626,983		$	577,264
Gross profit (loss)	17,283			31,454			14,795			20,049
Selling, general, and administrative expenses including research and development expense	26,505			25,993			29,639			25,379
Impairment of property, plant and equipment	—			1,341			—			48,532
Net income (loss) from operations	(9,222		)	4,120			(14,844		)	(53,862		)
Other income (expense), net	(5,617		)	(36,969		)	3,356			3,469
Net income (loss) attributable to the Company	(15,914		)	(34,809		)	(11,373		)	(16,983		)
Net income (loss) per share attributable to common stockholders - basic	(0.41		)	(0.90		)	(0.29		)	(0.44		)
Net income (loss) per share attributable to common stockholders - diluted	(0.41		)	(0.90		)	(0.29		)	(0.44		)



	Three Months Ended March 31, 2016			Three Months Ended June 30, 2016			Three Months Ended September 30, 2016		Three Months Ended December 31, 2016
Revenues	$	297,870		$	558,301		$	624,640	$	560,421
Gross profit (loss)	17,384			24,862			47,350		81,920
Selling, general, and administrative expenses including research and development expense	23,703			25,277			25,604		31,864
Impairment of property, plant and equipment	—			—			—		17,893
Net income (loss) from operations	(6,319		)	(415		)	21,746		32,163
Other income (expense), net	159			7,432			558		(6,343		)
Net income (loss) attributable to the Company	(6,918		)	7,606			23,442		20,197
Net income (loss) per share attributable to common stockholders - basic	(0.16		)	0.18			0.59		0.51
Net income (loss) per share attributable to common stockholders - diluted	(0.14		)	0.18			0.59		0.51

The results of operations for the three months ended December 31, 2017 reflect an asset impairment of $44,649 (before tax) related to the Company's New Orleans facility as further described in Note 2 and the impact of the “H.R. 1”, formerly known as the “Tax Cuts and Jobs Act” as signed into law on December 22, 2017. Refer to Note 11 for more details. The results of

operations for the three months ended December 31, 2016 reflected an asset impairment of $15,593 (before tax) related to the Company's Emporia facility. In addition, the results of operations for the three months ended September 30, 2017 and December 31, 2017 also reflect insurance proceeds of $3,000 and $5,000, respectively, and resulting gain on involuntary conversion of $942 and $4,387, respectively, related to the insurance coverage on property loss due to the June 2017 incident at the Company's Madison facility. For the year ended December 31, 2016, the Company recorded in its results of operations insurance proceeds of $19,037 for the property damages related to the events at its Geismar facility, which resulted in a total gain on involuntary conversion of $8,010.