Selected Quarterly Information (Unaudited) (Tables)

12 Months Ended

Sep. 30, 2012

Selected Quarterly Information (Unaudited) [Abstract]

Summarized data for each of the quarters

	2012
	Fourth Quarter		Third Quarter			Second Quarter			First Quarter
Net sales	$	36,949	$	55,201		$	56,233		$	43,281
Gross profit		13,349		22,963			25,060			20,658
Income from operations		6,194		15,601			16,472			12,598
Other income (expense), net		326		(14	)		351			334
Net income		4,266		10,736			11,431			8,685
Basic earnings per share	$	0.33	$	0.84		$	0.90		$	0.68
Diluted earnings per share	$	0.33	$	0.83		$	0.89		$	0.68
	2011
	Fourth Quarter		Third Quarter			Second Quarter			First Quarter
Net sales	$	32,805	$	46,368		$	50,696		$	43,101
Gross profit		12,780		20,556			21,684			19,093
Income from operations		6,049		13,511			13,048			11,797
Other income (expense), net		94		25			(44	)		139
Net income		3,589		9,207			8,702			8,213
Basic earnings per share	$	0.28	$	0.74		$	0.71		$	0.67
Diluted earnings per share	$	0.28	$	0.72		$	0.69		$	0.65