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Stock-based Compensation, Equity Grants, and Warrants - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands, shares in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2016 | Mar. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Document Fiscal Year Focus |  |  | 2016 |
Total compensation expense | $ 10 | $ 72 | $ 342 | $ 346
Unrecognized stock-based compensation expense | 101 | 302 | 101 | 302
DLH Employees |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Unrecognized stock-based compensation expense | 30 | 177 | 30 | 177
Non-employee Directors |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Unrecognized stock-based compensation expense | 71 | 125 | 71 | 125
Selling, General and Administrative Expenses | DLH Employees |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total compensation expense | 6 | 72 | 14 | 169
Selling, General and Administrative Expenses | Non-employee Directors |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total compensation expense | $ 4 | $ 0 | $ 328 | $ 177
Long Term Incentive Plan 2006 | Employee Stock Option |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Number of shares available for grant | 1.0 |  | 1.0 |
Expiration term |  |  | 10 years |
Total compensation expense |  |  | $ 304 |
Prior Long Term Incentive Plan [Member] | Employee Stock Option |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total compensation expense |  |  | $ 25 |

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