Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Sep. 30, 2017

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, 2015		March 31, 2016		June 30, 2016		September 30, 2016		December 31, 2016		March 31, 2017		June 30, 2017		September 30, 2017
	(Amounts in thousands except share and per share data)
Revenue	$	169,537	$	199,566	$	345,592	$	227,355	$	226,875	$	245,018	$	329,809	$	250,618
Cost of sales		127,923		150,539		266,690		170,870		173,737		183,959		245,017		184,292
Gross profit		41,614		49,027		78,902		56,485		53,138		61,059		84,792		66,326
Selling, general, and administrative expenses		38,951		43,459		54,325		49,041		47,095		54,781		59,557		58,593
Income from operations		2,663		5,568		24,577		7,444		6,043		6,278		25,235		7,733
Interest expense		1,227		1,582		1,473		1,180		1,569		2,045		1,897		1,970
Income before income income tax provision		1,436		3,986		23,104		6,264		4,474		4,233		23,338		5,763
Income tax provision		748		1,497		9,285		678		1,831		1,484		9,094		1,852
Net income	$	688	$	2,489	$	13,819	$	5,586	$	2,643	$	2,749	$	14,244	$	3,911
Net income per share:
Diluted	$	0.03	$	0.10	$	0.56	$	0.22	$	0.11	$	0.11		0.57		0.17
Weighted average number of shares:
Diluted		24,742,330		24,758,826		24,770,980		25,010,193		24,923,125		25,116,359		25,095,398		23,591,854