Stock-Based Compensation and Employee Benefit Plans (Tables)

12 Months Ended

Sep. 30, 2015

Stock-Based Compensation and Employee Benefit Plans

Schedule of weighted-average assumptions used for options granted

	Fiscal year ended September 30,
	2015			2014			2013
Significant assumptions:
Time based vesting
Risk-free rate(1)		.01%–3.07	%		.02%–3.65	%		.11%–4.59	%
Expected term(2)		6.5 years			6.5 years			6.5 years
Expected volatility(3)		37%			37%			36%
Expected dividends		0.0%			0.0%			0.0%
Performance based vesting
Risk-free rate(1)		.01%–3.07	%		.02%–3.65	%		.11%–4.59	%
Expected term(4)		4.3 years			3.1 years			4.5 years
Expected volatility(3)		33%			33%			37%
Expected dividends		0.0%			0.0%			0.0%

(1)	The risk free interest rate assumption was based on yields of U.S. Treasury securities in effect at the date of grant with terms similar to the expected term.
(2)	The expected term of the options was estimated utilizing the simplified method. We utilize the simplified method because the Company does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate expected term. The simplified method was used for all stock options that require only a service vesting condition.
(3)	Expected volatility was estimated based on historical volatility of peer companies over a period equivalent to the expected term. Peer companies are determined based on relevant industry and/or market capitalization.
(4)	The expected term of the options was estimated utilizing a Monte Carlo simulation model.

Summary of stock option activity

	Fiscal Year Ended September 30,
	2015					2014
	Number of shares			Weighted average exercise price		Number of shares			Weighted average exercise price
Outstanding at beginning of period		139,647		$	212		173,183		$	179
Granted		106,530		$	373		13,430		$	473
Exercised		(9,554	)	$	150		(614	)	$	133
Forfeited		(18,220	)	$	268		(46,352	)	$	153
Outstanding at end of period		218,403		$	289		139,647		$	212
Exercisable at end of period		57,923		$	190		50,360		$	152
Number of shares available for future grant		32,676

Summary of information about stock options outstanding, by range of exercise prices

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Shares Outstanding		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price		Shares Exercisable		Weighted Average Exercise Price		Intrinsic Value
$124		72,098		4.1	$	124		41,210	$	124	$	10,278
$298		22,650		6.7	$	298		6,950	$	298	$	517
$373		106,080		9.3	$	373		6,015	$	373	$	—
$396		6,830		6.6	$	396		2,251	$	396	$	—
$473		10,745		8.5	$	473		1,497	$	473	$	—