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The Incentive Stock Plans (Tables)
12 Months Ended
Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Incentive Stock Plans Option Activity

The following table summarizes option activity from September 30, 2014 through September 30, 2015:

 

 

 

Shares

Available

for Grant

 

 

Options

Outstanding

 

 

Aggregate

Intrinsic

Value

(in thousands)

 

 

Weighted

Average

Exercise

Price

 

 

Weighted

Average

Remaining

Contractual

Life

 

Balance as of September 30, 2014

 

 

1,350,709

 

 

 

2,226,319

 

 

$

15,980

 

 

$

11.70

 

 

 

6.6

 

Options authorized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Options granted

 

 

(295,000

)

 

 

295,000

 

 

 

 

 

 

$

15.90

 

 

 

 

 

Options cancelled/forfeited/expired

 

 

105,814

 

 

 

(105,814

)

 

 

 

 

 

$

24.45

 

 

 

 

 

Restricted stock awards issued

 

 

(111,000

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Options exercised

 

 

 

 

 

(477,631

)

 

 

 

 

 

$

6.37

 

 

 

 

 

Balance as of September 30, 2015

 

 

1,050,523

 

 

 

1,937,874

 

 

$

6,285

 

 

$

12.95

 

 

 

6.5

 

Exercisable as of September 30, 2015

 

 

 

 

 

 

1,148,999

 

 

$

6,121

 

 

$

11.16

 

 

 

5.1

 

 

Weighted Average Assumptions of Incentive Stock Plans

The following are the weighted-average assumptions used for the fiscal years ended September 30,

 

 

 

2013

 

 

2014

 

 

2015

 

Dividend yield

 

 

0.0%

 

 

 

0.0%

 

 

 

0.0%

 

Risk-free interest rate

 

 

0.6%

 

 

 

0.7%

 

 

 

0.9%

 

Volatility

 

 

80.1%

 

 

 

55.7%

 

 

 

47.4%

 

Expected life

 

4.3 years

 

 

3.2 years

 

 

3.1 years