Stockholders' Equity (Details) - USD ($)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock outstanding (in shares)	0
Common stock authorized (in shares)	63,000,000	63,000,000
Common stock issued (in shares)	33,071,331	32,660,583
Common stock outstanding (in shares)	33,071,331	32,660,583
Number of shares surrendered by employees	16,779	10,302	23,602
Value of redeemed stock	$ 222,000	$ 192,000	$ 450,000
Dividends paid	$ 0	$ 0	$ 0
382 ownership limitation	4.95%