Income and other Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income tax expense	$ (120)	$ (2)	$ (2)
Income tax expense, discontinued operations	$ 0	$ 13
Effective tax rate	(6.40%)	1.50%
Income tax penalties and interest accrued	$ 300			$ 300