Supporting Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2008
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable		$ 3,286	$ 12,372
Less: Allowance for doubtful accounts		0	0
Accounts Receivable, Net		3,286	12,372
Retroactive billing	$ 9,300
Accrued liabilites for salaries to employees and related benefits			0
Accrued interest and penalties	$ (629)
Billed Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable		2,498	2,569
Unbilled Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable		788	9,803
DVA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract revenue nonrecurring				$ 10,800
Unfavorable Regulatory Action | Department of Labor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued salaries and benefits				$ 10,100
Accrued liabilites for salaries to employees and related benefits		(8,677)
Unfavorable Regulatory Action | Department of Labor | Unbilled Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable		0	9,306
Accrued Income Receivable [Member] | Unbilled Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable		$ 788	$ 497