Geographical Information (Narrative) (Details)		12 Months Ended			369 Months Ended
	Dec. 10, 2014 segment	Sep. 30, 2016 segment customers	Sep. 30, 2015 customers	Sep. 30, 2014 customers	Sep. 30, 2014 segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of reporting segments | segment	1	1			2
Number of customers | customers		3	4	3
Percentage of long-lived assets located in the United States		38.00%
Customer Concentration Risk [Member] | Sales Revenue, Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Concentration risk percentage		61.00%	61.00%	41.00%