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Employee Benefit Plans | 12 Months Ended
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Sep. 30, 2017
Compensation and Retirement Disclosure [Abstract] |
Employee Benefits Plans | Employee Benefit Plans As of September 30, 2017, DLH and its subsidiaries maintain the DLH 401(k) Plan (the "401(k) Plan") , a defined contribution and supplemental pension plan for the benefit of its eligible employees. DLH may provide a discretionary matching contribution of a participant's elective contributions under the 401 (k) Plan. DLH recorded related expense of $154.4 thousand in fiscal 2017 and $142.0 thousand in fiscal year 2016. A participant is always fully vested in his or her elective contributions and vests in Company matching contributions over a four year period.

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