Represents the estimated additional indirect costs and fees associated with a contract modification pending final approval.

No definition available.

+ Details

Name:	dlhc_AdditionalIndirectCostsAndFeesEstimatedAmountPendingApproval
Namespace Prefix:	dlhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the revenue earned during the period arising from services provided under the terms of a contract related to retroactive billings which are nonrecurring.

+ References

No definition available.

+ Details

Name:	dlhc_ContractRevenueNonrecurring
Namespace Prefix:	dlhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the costs incurred during the period arising from services provided under the terms of a contract related to retroactive billings which are nonrecurring.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of receivables that are derived from government contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 912

-SubTopic 310

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6471842&loc=d3e55295-109406

+ Details

Name:	us-gaap_GovernmentContractReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

COMMITMENTS AND CONTINGENCIES: (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended
	Sep. 30, 2008	Sep. 30, 2008 Department of Veterans Affairs	Sep. 30, 2012 Department of Veterans Affairs	Sep. 30, 2011 Department of Veterans Affairs	Sep. 30, 2012 Department of Veterans Affairs Minimum	Sep. 30, 2012 Department of Veterans Affairs Maximum
COMMITMENTS AND CONTINGENCIES
Contract revenue, nonrecurring	$ 10.8	$ 10.8
Direct costs related to nonrecurring contract revenue	10.1	10.1
Accounts receivable			9.3	9.3
Estimated additional indirect costs and fees associated with contract modification pending final approval					$ 0.4	$ 0.6