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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 |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Document Fiscal Year Focus | 2017 |  |
Total compensation expense | $ 485 | $ 332 |
Unrecognized stock-based compensation expense | 20 | 112 |
DLH Employees |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Unrecognized stock-based compensation expense | 12 | 36 |
Non-employee Directors |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Unrecognized stock-based compensation expense | 8 | 76 |
Selling, General and Administrative Expenses | DLH Employees |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total compensation expense | 6 | 8 |
Selling, General and Administrative Expenses | Non-employee Directors |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total compensation expense | 479 | 324 |
Restricted Stock [Member] | Non-employee Directors |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Total compensation expense | $ 456 | $ 304 |
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 |  |  | 0.9
Expiration term | 10 years |  |

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