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Stock-Based Compensation (Tables) | 12 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock-Based Compensation Expense | Stock-based compensation expense is included in the consolidated results of operations as follows (in thousands):
| Fiscal years ended September 30,
| 2017 |  | 2016 |  | 2015
Cost of sales | $ | 213 |  |  | $ | 215 |  |  | $ | 221 |
Sales and marketing | 1,348 |  |  | 921 |  |  | 1,158 |
Research and development | 656 |  |  | 590 |  |  | 561 |
General and administrative | 2,442 |  |  | 1,923 |  |  | 1,941 |
Stock-based compensation before income taxes | 4,659 |  |  | 3,649 |  |  | 3,881 |
Income tax benefit | (1,536 | ) |  | (1,185 | ) |  | (1,343 | )
Stock-based compensation after income taxes | $ | 3,123 |  |  | $ | 2,464 |  |  | $ | 2,538 |
Schedule of Stock Option Activity | The following table summarizes our stock option activity (in thousands, except per common share amounts):
|  | Options Outstanding |  | Weighted Average Exercised Price |  | Weighted Average Contractual Term (in years) |  | Aggregate Intrinsic Value (1)
Balance at September 30, 2016 |  | 3,963 |  |  | $10.36 |  |  |  |
Granted |  | 601 |  |  | 12.86 |  |  |  |
Exercised |  | (335 | ) |  | 10.45 |  |  |  |
Forfeited / Canceled |  | (327 | ) |  | 12.68 |  |  |  |
Balance at September 30, 2017 |  | 3,902 |  |  | $10.54 |  | 4.2 |  | $ | 3,593 |
Exercisable at September 30, 2017 |  | 2,746 |  |  | $10.18 |  | 3.5 |  | $ | 2,769 |
(1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $10.60 as of September 30, 2017, which would have been received by the option holders had all option holders exercised their options as of that date.
Schedule of Valuation Assumptions | The table below shows the weighted average fair value, which was determined based upon the fair value of each option on the grant date utilizing the Black-Scholes option-pricing model and the related assumptions:
| Fiscal years ended September 30,
| 2017 |  | 2016 |  | 2015
Weighted average per option grant date fair value | $ | 4.63 |  |  | $ | 3.90 |  |  | $ | 2.98 |
Assumptions used for option grants: |  |  |  |  |
Risk free interest rate | 1.46% - 1.96% |  | 1.22% - 1.85% |  | 1.57% - 1.85%
Expected term | 6.00 years |  | 6.00 years |  | 6.00 years
Expected volatility | 33% - 34% |  | 32% - 33% |  | 32% - 36%
Weighted average volatility | 34% |  | 32% |  | 35%
Expected dividend yield | 0% |  | 0% |  | 0%
Schedule of Weighted Average Exercise Price Range and Remaining Contractual Life | At September 30, 2017, the weighted average exercise price and remaining life of the stock options are as follows (in thousands, except remaining life and exercise price):
Options Outstanding |  | Options Exercisable
Range of Exercise Prices |  | Options Outstanding |  | Weighted Average Remaining Contractual Life (In Years) |  | Weighted Average Exercise Price |  | Number of Shares Vested |  | Weighted Average Exercise Price
$7.40 - $8.30 |  | 858 |  |  | 4.01 |  | $ | 7.95 |  |  | 623 |  |  | $ | 7.92 |
$8.31 - $9.59 |  | 623 |  |  | 3.98 |  | $ | 9.14 |  |  | 551 |  |  | $ | 9.16 |
$9.60 - $10.52 |  | 554 |  |  | 4.02 |  | $ | 9.86 |  |  | 405 |  |  | $ | 9.84 |
$10.53 - $10.81 |  | 567 |  |  | 3.91 |  | $ | 10.73 |  |  | 556 |  |  | $ | 10.72 |
$10.82 - $12.63 |  | 604 |  |  | 4.82 |  | $ | 12.11 |  |  | 394 |  |  | $ | 11.96 |
$12.64 - $14.75 |  | 490 |  |  | 6.09 |  | $ | 13.53 |  |  | 11 |  |  | $ | 14.75 |
$14.76 - $15.23 |  | 206 |  |  | 0.16 |  | $ | 15.23 |  |  | 206 |  |  | $ | 15.23 |
$7.40 - $15.23 |  | 3,902 |  |  | 4.18 |  | $ | 10.54 |  |  | 2,746 |  |  | $ | 10.18 |
Schedule of Nonvested Restricted Stock Units | A summary of our non-vested restricted stock units as of September 30, 2017 and changes during the twelve months then ended is presented below (in thousands, except per common share amounts):
| Number of Awards |  | Weighted Average Grant Date Fair Value
Nonvested at September 30, 2016 | 505 |  |  | $ | 9.67 |
Granted | 285 |  |  | $ | 12.77 |
Vested | (202 | ) |  | $ | 9.42 |
Canceled | (22 | ) |  | $ | 10.59 |
Nonvested at September 30, 2017 | 566 |  |  | $ | 11.28 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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