Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Threshold Vesting Price

No definition available.

Name:	dlhc_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsThresholdVestingPrice
Namespace Prefix:	dlhc_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Per share or unit weighted-average intrinsic value of award vested under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodIntrinsicValue
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dlhc_FairValueAssumptionAxis=dlhc_FairValueAssumptionOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dlhc_FairValueAssumptionAxis=dlhc_FairValueAssumptionTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dlhc_FairValueAssumptionAxis=dlhc_FairValueAssumptionThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dlhc_FairValueAssumptionAxis=dlhc_FairValueAssumptionFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dlhc_FairValueAssumptionAxis=dlhc_FairValueAssumptionFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock-based Compensation and Equity Grants - Stock Options Fair Value Assumptions (Details) - Stock Options - $ / shares			12 Months Ended
	Aug. 01, 2022	Nov. 08, 2021	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility			50.00%
Expected term (Years)			10 years
Fair Value Assumption One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Strike price (in dollars per share)		$ 0.1601
Stock price (in dollars per share)		$ 0.1601
Expected term (Years)		10 years
Calculated fair value (in dollars per share)		$ 0.0968
Fair Value Assumption Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Strike price (in dollars per share)		0.1601
Stock price (in dollars per share)		0.1601
Vesting threshold price (in dollars per share)		$ 0.2400
Expected term (Years)		10 years
Calculated fair value (in dollars per share)		$ 0.0968
Fair Value Assumption Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Strike price (in dollars per share)		0.1601
Stock price (in dollars per share)		0.1601
Vesting threshold price (in dollars per share)		$ 0.2800
Expected term (Years)		10 years
Calculated fair value (in dollars per share)		$ 0.0964
Fair Value Assumption Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Strike price (in dollars per share)		0.1601
Stock price (in dollars per share)		0.1601
Vesting threshold price (in dollars per share)		$ 0.3200
Expected term (Years)		10 years
Calculated fair value (in dollars per share)		$ 0.0958
Fair Value Assumption Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Strike price (in dollars per share)	$ 17.77
Stock price (in dollars per share)	17.77
Vesting threshold price (in dollars per share)	$ 23.00
Expected term (Years)	10 years
Calculated fair value (in dollars per share)	$ 9.68