Income and other Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax benefit computed at U.S. federal statutory rate									$ (1,518)	$ (6,959)	$ (3,042)
State tax expense benefit, net of U.S. federal effect									(356)	(776)	(317)
Foreign tax rate differential									(269)	1,041	(34)
Release of valuation allowance-domestic									0	(17,856)	0
Other									108	0	0
Change in valuation allowance									(156)	0	0
Income tax benefit	$ (339)	$ 456	$ (396)	$ (1,912)	$ (23,171)	$ (732)	$ 433	$ (1,080)	$ (2,191)	$ (24,550)	$ (3,393)
Effective tax rate									49.10%	119.90%	37.90%