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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 |

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