Supporting Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 8,871	$ 6,637
Less: Allowance for doubtful accounts	0	0
Accounts Receivable, Net	8,871	6,637
Billed Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	7,459	5,265
Unbilled Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 1,412	$ 1,372