Income Tax Provision (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Current income tax provision:
U.S. federal	$ 419	$ 334
U.S. state and local	70	58
Non-U.S	6	15
Total current tax provision	495	407
Deferred income tax provision (benefit):
U.S. federal	0	(25)
Non-U.S	0	0
Total deferred tax provision	0	(25)
Income tax provision	$ 495	$ 382