Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Property And Equipment Details [Abstract]
Land	$ 1,906		$ 1,906		$ 1,952
Buildings and Improvements, Gross	14,592		14,592		14,420
Machinery and Equipment, Gross	36,095		36,095		33,075
Computer Equipment Gross	8,742		8,742		8,276
Construction in Progress, Gross	2,269		2,269		1,773
Property, Plant and Equipment, Gross	63,604		63,604		59,496
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(26,256)		(26,256)		(23,712)
Property and equipment, net	37,348		37,348		35,784
Depreciation	$ 1,732	$ 1,582	$ 3,449	$ 3,040