| **Significant Accounting Policies** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  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| **Accounting Policies [Abstract]**  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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| Significant Accounting Policies     | 7. Significant Accounting PoliciesUse of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Significant estimates include valuation of goodwill, expected settlement amounts of accounts receivable, valuation allowances established against accounts receivable and deferred tax assets, measurement of loss development on workers’ compensation claims, and the valuation of derivative financial instruments associated with debt agreements.  Actual results could differ from those estimates.  In particular, a material reduction in the fair value of goodwill would have a material adverse effect on the Company’s financial position and results of operations.Revenue Recognition DLH’s revenue is derived from professional and other specialized service offerings to US Government agencies through a variety of contracts, some of which are fixed-price in nature and/or sourced through Federal Supply Schedules administered by the General Services Administration (“GSA”) at fixed unit rates or hourly arrangements. We generally operate as a prime contractor, but have also entered into contracts as a subcontractor. The recognition of revenue from fixed rates is based upon objective criteria that generally do not require significant estimates that may change over time. DLH recognizes and records revenue on government contracts when it is realized, or realizable, and earned. DLH considers these requirements met when: (a) persuasive evidence of an arrangement exists; (b) the services have been delivered to the customer; (c) the sales price is fixed or determinable and free of contingencies or significant uncertainties; and (d) collectibility is reasonably assured.Goodwill DLH continues to review its goodwill for possible impairment or loss of value at least annually or more frequently upon the occurrence of an event or when circumstances indicate that a reporting unit’s carrying amount is greater than its fair value.  At September 30, 2014, we performed a goodwill impairment evaluation. We performed both a qualitative and quantitative assessment of factors to determine whether it was necessary to perform the goodwill impairment test. Based on the results of the work performed, the Company has concluded that no impairment loss was warranted at September 30, 2014. Factors including non-renewal of a major contract or other substantial changes in business conditions could have a material adverse effect on the valuation of goodwill in future periods and the resulting charge could be material to future periods’ results of operations. If an impairment write off of all the goodwill became necessary in future periods, a charge of up to $8.6 million would be expensed in the Consolidated Statement of Operations. All remaining goodwill is attributable to the DLH Solutions operating subsidiary.Income Taxes DLH accounts for income taxes in accordance with the liability method, whereby deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities, using enacted tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets are reflected on the consolidated balance sheet when it is determined that it is more likely than not that the asset will be realized. This guidance also requires that deferred tax assets be reduced by a valuation allowance if it is more likely than not that some or all of the deferred tax asset will not be realized.  We account for uncertain tax positions by recognizing the financial statement effects of a tax position only when, based upon the technical merits, it is "more-likely-than-not" that the position will be sustained upon examination. We had no uncertain tax positions at either September 30, 2014 and 2013. We report interest and penalties as a component of income tax expense. In the fiscal years ending September 30, 2014 and 2013, we recognized no interest and no penalties related to income taxes.The Company has adequate net operating loss carryforwards to offset against any taxable income in the current period. The Company recorded a valuation allowance against its net deferred tax assets of $11.1 million and $16.0 million at September 30, 2014 and 2013, respectively.  Tax years open for examination are 2010 and forward.  Cash and Cash EquivalentsWe consider all highly liquid investments with an original maturity of three months or less when purchased to be cash equivalents.  We maintain cash balances at financial institutions that are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000.  Deposits held with financial institutions may exceed the $250,000 limit. |

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| - Definition
The entire disclosure for all significant accounting policies of the reporting entity.
+ References
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