Business Overview	9 Months Ended
Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview	Business Overview DLH is a full-service provider of technology-enabled health and readiness enhancement services to government agencies including the Department of Veteran Affairs ("VA"), Department of Health and Human Services ("HHS"), Department of Defense ("DoD"), and other government agencies. DLH Holdings Corp. (together with its subsidiaries, "DLH" or the "Company" and also referred to as "we," "us" and "our") manages its operations from its principal executive offices in Atlanta, Georgia. We have complimentary headquarters offices in Silver Spring, Maryland. We employ over 1,400 skilled employees working in more than 30 locations throughout the United States. On May 3, 2016, DLH acquired Danya International, LLC (“Danya”) which provides program management, information technology, consulting, training, and digital health promotion solutions to the federal government and other customers. We acquired Danya to expand our health IT capabilities, our presence in key targeted agencies, and raise our ability to compete and execute in more complex and challenging federal markets. This acquisition was in line with our strategic growth initiatives, and we intend to continue to consider other potential transactions to complement our organic growth in the future. Presently, the Company derives 100% of its revenue from agencies of the federal government, primarily as a prime contractor but also as a subcontractor to other Federal prime contractors. A major customer is defined as a customer from whom the Company derives at least 10% of its revenues. Our largest customer continues to be the VA, which comprised approximately 58% and 83% of revenue for the nine months ended June 30, 2017 and 2016, respectively. Additionally, HHS represents a major customer, comprising 32% of revenue for the nine months ended June 30, 2017. In addition, substantially all accounts receivable, including unbilled accounts receivable, are from agencies of the U.S. Government as of June 30, 2017 and September 30, 2016. We believe that the credit risk associated with our receivables is limited due to the creditworthiness of these customers. See Note 4, Supporting Financial Information-Accounts Receivable. As of June 30, 2017, awards from VA and HHS have anticipated periods of performance of up to three years. These agreements are subject to the Federal Acquisition Regulations. While there can be no assurance as to the actual amount of services that the Company will ultimately provide to VA and HHS under its current contracts, we believe that our strong working relationships and our effective service delivery support ongoing performance for the contract term. The Company's results of operations, cash flows and financial condition would be materially adversely affected in the event that we were unable to continue our relationship with VA or HHS.

Business Overview

DLH is a full-service provider of technology-enabled health and readiness enhancement services to government agencies including the Department of Veteran Affairs ("VA"), Department of Health and Human Services ("HHS"), Department of Defense ("DoD"), and other government agencies. DLH Holdings Corp. (together with its subsidiaries, "DLH" or the "Company" and also referred to as "we," "us" and "our") manages its operations from its principal executive offices in Atlanta, Georgia. We have complimentary headquarters offices in Silver Spring, Maryland. We employ over 1,400 skilled employees working in more than 30 locations throughout the United States.

On May 3, 2016, DLH acquired Danya International, LLC (“Danya”) which provides program management, information technology, consulting, training, and digital health promotion solutions to the federal government and other customers. We acquired Danya to expand our health IT capabilities, our presence in key targeted agencies, and raise our ability to compete and execute in more complex and challenging federal markets. This acquisition was in line with our strategic growth initiatives, and we intend to continue to consider other potential transactions to complement our organic growth in the future.

Presently, the Company derives 100% of its revenue from agencies of the federal government, primarily as a prime contractor but also as a subcontractor to other Federal prime contractors. A major customer is defined as a customer from whom the Company derives at least 10% of its revenues.

Our largest customer continues to be the VA, which comprised approximately 58% and 83% of revenue for the nine months ended June 30, 2017 and 2016, respectively. Additionally, HHS represents a major customer, comprising 32% of revenue for the nine months ended June 30, 2017. In addition, substantially all accounts receivable, including unbilled accounts receivable, are from agencies of the U.S. Government as of June 30, 2017 and September 30, 2016. We believe that the credit risk associated with our receivables is limited due to the creditworthiness of these customers. See Note 4, Supporting Financial Information-Accounts Receivable.

As of June 30, 2017, awards from VA and HHS have anticipated periods of performance of up to three years. These agreements are subject to the Federal Acquisition Regulations. While there can be no assurance as to the actual amount of services that the Company will ultimately provide to VA and HHS under its current contracts, we believe that our strong working relationships and our effective service delivery support ongoing performance for the contract term. The Company's results of operations, cash flows and financial condition would be materially adversely affected in the event that we were unable to continue our relationship with VA or HHS.