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Business Overview (Details)	3 Months Ended
	Dec. 31, 2017 employee location	Dec. 31, 2016
Concentration Risk [Line Items]
Number of employees | employee	1,400
Number of locations in which entity operates | location	30
US Government [Member] | Customer concentration | Revenue concentration
Concentration Risk [Line Items]
Concentration risk percentage	100.00%
Department of Veterans Affairs [Member] | Customer concentration | Revenue concentration
Concentration Risk [Line Items]
Concentration risk percentage	66.00%	61.00%
Human Services and Solutions [Member] | Customer concentration | Revenue concentration
Concentration Risk [Line Items]
Concentration risk percentage	32.00%	29.00%
Department of Defense and Department of Veterans Affairs [Member] | Minimum
Concentration Risk [Line Items]
Government contract, term of award	1 year
Department of Defense and Department of Veterans Affairs [Member] | Maximum
Concentration Risk [Line Items]
Government contract, term of award	2 years

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Number of persons employed by the Entity

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- Definition

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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.

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 825
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-Section 50
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