SUBSEQUENT EVENTS: (Details) (Subsequent Event, USD $)	Aug. 31, 2012
Subsequent Event
SUBSEQUENT EVENTS:
Maximum liability under agreement	$ 355,500

Represents the maximum amount of contingent liability of debt instrument, as of the balance sheet, under the settlement agreement.

No definition available.

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