Name:	dlhc_AccruedSeveranceRelatedLiabilitiesCurrent
Namespace Prefix:	dlhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dlhc_EmploymentAgreementsAbstract
Namespace Prefix:	dlhc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the remaining liability for penalties and interest related to payroll taxes.

No definition available.

Name:	dlhc_LossContingencyPayrollTaxesPenaltiesAndInterestAccrued
Namespace Prefix:	dlhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the penalties and interest sought by IRS related to payroll taxes.

No definition available.

Name:	dlhc_LossContingencyPayrollTaxesPenaltiesAndInterestSought
Namespace Prefix:	dlhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the maximum lump sum payments to employee as a percentage of annual salary in the event of a change in control of the entity.

No definition available.

Name:	dlhc_MaximumLumpSumPaymentsToEmployeeAsPercentageOfAnnualSalary
Namespace Prefix:	dlhc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the number of subsidiaries of the entity prior to the sale of the assets from discontinued operation in fiscal 2003.

No definition available.

Name:	dlhc_NumberOfSubsidiariesOperatingBeforeSaleOfAssetsOfDiscontinuedOperationInFiscal2003
Namespace Prefix:	dlhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the charge against earnings in the period for known and estimated costs of termination benefits provided to officers that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities.

No definition available.