Supporting Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Total accounts receivable	$ 6,637	$ 3,286
Less: Allowance for doubtful accounts	0	0
Accounts receivable, net	6,637	3,286
Billed Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	5,265	2,498
Unbilled Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 1,372	$ 788