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Business Overview (Details)	12 Months Ended
	Sep. 30, 2017 employee location	Sep. 30, 2016
Concentration Risk [Line Items]
Number of employees (more than 1,400) | employee	1,400
Minimum number of locations in which entity operates | location	30
VA and HHS | Minimum
Concentration Risk [Line Items]
Term of government contract	1 year
VA and HHS | Maximum
Concentration Risk [Line Items]
Term of government contract	3 years
Revenue concentration | Customer concentration | VA
Concentration Risk [Line Items]
Concentration risk percentage	62.00%	72.00%
Revenue concentration | Customer concentration | HHS
Concentration Risk [Line Items]
Concentration risk percentage	34.00%	13.00%

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- Definition

Number of persons employed by the Entity

+ References

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- Definition

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+ References

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- Definition

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

+ References

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- 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.

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- 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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