Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011
Components of income Before Income tax provision
U.S									$ 8,419	$ 10,388
Non-U.S									981	850
Income before income tax provision	$ 1,669	$ 3,302	$ 2,696	$ 1,733	$ 3,500	$ 2,879	$ 3,002	$ 1,857	$ 9,400	$ 11,238