Detail of Certain Balance Sheet Accounts - AR (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Allowance For Doubtful Accounts Receivable [Abstract]
Allowance for Doubtful Accounts Receivable Beginning Balance	$ 780	$ 980
Additions to costs and expenses	416	170
Allowance For Doubtful Accounts Receivable Charge Offs	(354)	(370)
Allowance for Doubtful Accounts Receivable Ending Balance	$ 842	$ 780