Basis of Presentation Summary of the Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of product revenue	$ 82,023	$ 65,226	$ 157,701	$ 123,258
Cost of service revenue	22,786	23,255	50,120	44,624
Total cost of revenue	$ 104,809	88,481	$ 207,821	167,882
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of product revenue		65,346		123,496
Cost of service revenue		23,135		44,386
Total cost of revenue		88,481		167,882
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of product revenue		(120)		(238)
Cost of service revenue		120		238
Total cost of revenue		$ 0		$ 0