Income Tax Provision (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Current income tax provision:
U.S. federal	$ 309	$ 607
U.S. state and local	64	68
Non-U.S	22	6
Total current tax provision	395	681
Deferred income tax provision:
U.S. federal	41	0
U.S state and local	0	0
Total deferred tax provision	41	0
Income tax provision	$ 436	$ 681