Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 266		$ 400		$ 614
(Recoveries)/ Additions	76		(100)		(156)
Deductions	0		34		58
Balance at End of Period	342		266		400
Valuation Allowance of Deferred Tax Assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	0		12,651		14,752
(Recoveries)/ Additions	0		0		0
Deductions	0		12,651		2,101
Balance at End of Period	0		0		12,651
Valuation Allowance of Value Added Tax (VAT)
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	722	[1]	817	[1],[2]	880	[2]
(Recoveries)/ Additions	0		37	[1]	0	[2]
Deductions	15		132	[1]	63	[2]
Balance at End of Period	$ 707		$ 722	[1]	$ 817	[1],[2]

[1] Additions in 2012 were due to foreign currency changes.

[2] Deductions in 2011 were due to foreign currency changes.