Balance Sheet Account Detail - Deferred revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Sep. 30, 2015
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	$ 6,513	$ 3,511
Mundipharma [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	0	1,255
EVOMELA [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	0	1,887
Fusilev [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	6,083	0	$ 9,900
Product sales, net	3,800
Dr. Reddy [Member]
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	$ 430	$ 369