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Summary of Significant Accounting Policies Goodwill Text (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Goodwill [Line Items]
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Goodwill and intangible asset impairment expense	$ 1,164	$ 0	$ 0
Goodwill	8,222	9,005	$ 9,005
Orlando Florida Campus
Goodwill [Line Items]
Goodwill		8,200
BrokenMyth Studios, LLC [Member]
Goodwill [Line Items]
Goodwill and intangible asset impairment expense	800
Impairment of Intangible Assets, Finite-lived	$ 400
Goodwill		$ 800

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