XML 35 R25.htm IDEA: XBRL DOCUMENT v3.10.0.1

Business Overview (Details)	3 Months Ended
	Dec. 31, 2018 employee contract location option	Dec. 31, 2017
Revenue concentration | Customer concentration | US Federal Government
Concentration Risk [Line Items]
Concentration risk percentage	100.00%
Revenue concentration | Customer concentration | VA
Concentration Risk [Line Items]
Concentration risk percentage	68.00%	66.00%
Number of contracts	16
Revenue concentration | Customer concentration | VA | Pharmacy Services
Concentration Risk [Line Items]
Concentration risk percentage	58.00%
Number of contracts	9
Revenue concentration | Customer concentration | VA | Logistic Services
Concentration Risk [Line Items]
Number of contracts	7
Revenue concentration | Customer concentration | HHS
Concentration Risk [Line Items]
Concentration risk percentage	30.00%	32.00%
Revenue concentration | Customer concentration | Defense/VA
Concentration Risk [Line Items]
Concentration risk percentage	69.00%
Revenue concentration | Customer concentration | Human Services and Solutions
Concentration Risk [Line Items]
Concentration risk percentage	29.00%
Revenue concentration | Customer concentration | Public Health/Life Sciences
Concentration Risk [Line Items]
Concentration risk percentage	2.00%
Revenue concentration | Customer concentration | Public Health/Life Sciences | Time and materials
Concentration Risk [Line Items]
Concentration risk percentage	97.00%
Revenue concentration | Customer concentration | Public Health/Life Sciences | Cost plus fixed fee
Concentration Risk [Line Items]
Concentration risk percentage	2.00%
Revenue concentration | Customer concentration | Public Health/Life Sciences | Firm fixed price
Concentration Risk [Line Items]
Concentration risk percentage	1.00%
Revenue concentration | Customer concentration | Head Start Program
Concentration Risk [Line Items]
Concentration risk percentage	28.00%	28.00%
Revenue concentration | Customer concentration | Head Start Program | Time and materials
Concentration Risk [Line Items]
Government contract, number of option periods | option	4
Government contract, term of award	5 years
Revenue concentration | Revenue from Rights Concentration Risk [Member] | Prime
Concentration Risk [Line Items]
Concentration risk percentage	99.00%
Revenue concentration | Revenue from Rights Concentration Risk [Member] | Subcontractor
Concentration Risk [Line Items]
Concentration risk percentage	1.00%
UNITED STATES
Concentration Risk [Line Items]
Number of employees | employee	1,600
Number of locations in which entity operates | location	30

X

- Definition

Number of persons employed by the Entity

+ References

No definition available.

+ Details

Name:	dei_EntityNumberOfEmployees
Namespace Prefix:	dei_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Government Contract, Number of Option Periods

+ References

No definition available.

+ Details

Name:	dlhc_GovernmentContractNumberofOptionPeriods
Namespace Prefix:	dlhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the term of the award granted to the entity.

+ References

No definition available.

+ Details

Name:	dlhc_GovernmentContractTermofAward
Namespace Prefix:	dlhc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the minimum number of locations the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	dlhc_NumberOfLocationsInWhichEntityOperatesMinimum
Namespace Prefix:	dlhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of Contracts

+ References

No definition available.

+ Details

Name:	dlhc_NumberofContracts
Namespace Prefix:	dlhc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueServicesNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_USGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_DepartmentOfVeteransAffairsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=dlhc_PharmacyServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=dlhc_LogisticServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_DepartmentofHealthandHumanServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_DepartmentOfDefenseAndDepartmentOfVeteransAffairsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_HumanServicesandSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_DepartmentofPublicHealthandLifeSciencesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_TimeAndMaterialsContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerBasisOfPricingAxis=dlhc_CostPlusFixedFeeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_FixedPriceContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dlhc_HeadStartProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_RevenueFromRightsConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerSalesChannelAxis=us-gaap_SalesChannelDirectlyToConsumerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerSalesChannelAxis=us-gaap_SalesChannelThroughIntermediaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: