Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Sep. 30, 2016

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information

The following table sets forth certain unaudited quarterly financial data for each of our last eight quarters. The information has been derived from unaudited financial statements that we believe reflect all adjustments, consisting only of normal recurring adjustments, necessary for the fair presentation of such quarterly financial information.

	December 31, 2014		March 31, 2015		June 30, 2015		September 30, 2015			December 31, 2015		March 31, 2016		June 30, 2016		September 30, 2016
	(Amounts in thousands except share and per share data)
Revenue	$	158,126	$	172,143	$	231,849	$	189,252		$	169,537	$	199,566	$	345,592	$	227,355
Cost of sales		120,671		129,943		174,809		141,180			127,923		150,539		266,690		170,870
Gross profit		37,455		42,200		57,040		48,072			41,614		49,027		78,902		56,485
Selling, general, and administrative expenses		36,095		40,557		41,049		41,734			38,951		43,459		54,325		49,041
Income from operations		1,360		1,643		15,991		6,338			2,663		5,568		24,577		7,444
Interest expense		1,146		1,253		1,141		914			1,227		1,582		1,473		1,180
Income before income income tax (benefit) provision		214		390		14,850		5,424			1,436		3,986		23,104		6,264
Income tax (benefit) provision		—		—		—		(27,414	)		748		1,497		9,285		678
Net income	$	214	$	390	$	14,850	$	32,838		$	688	$	2,489	$	13,819	$	5,586
Net income per share:
Diluted	$	0.01	$	0.02	$	0.59	$	1.32		$	0.03	$	0.10	$	0.56	$	0.22
Weighted average number of shares:
Diluted		24,947,968		25,265,857		25,316,092		24,883,360			24,742,330		24,758,826		24,770,980		25,010,193