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Share-Based Compensation: (Details 3) (Options, USD $) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 | Mar. 31, 2013
Share-based compensation |  |  |  |
Unrecognized compensation cost, related to non-vested stock options | $ 59,000 |  |  |
1998 Plan |  |  |  |
Share-based compensation |  |  |  |
Unrecognized compensation cost, related to non-vested stock options | 0 |  |  |
1998 Plan | Minimum |  |  |  |
Share-based compensation |  |  |  |
Vesting period | 3 years |  |  |
1998 Plan | Maximum |  |  |  |
Share-based compensation |  |  |  |
Expiration term | 10 years |  |  |
Vesting period | 5 years |  |  |
2009 Plan |  |  |  |
Share-based compensation |  |  |  |
Unrecognized compensation cost, related to non-vested stock options | $ 1,118,000 |  |  | $ 59,000
Period over which unrecognized compensation cost is expected to be recognized | 3 years |  |  |
Fair value assumptions |  |  |  |
Expected volatility (as a percent) | 64.60% | 71.10% | 63.00% |
Weighted average risk-free interest rate (as a percent) | 1.00% | 2.10% | 1.90% |
Expected lives | 7 years 7 months 6 days | 8 years 8 months 12 days | 10 years |
2009 Plan | Minimum |  |  |  |
Share-based compensation |  |  |  |
Vesting period | 3 years |  |  |
2009 Plan | Maximum |  |  |  |
Share-based compensation |  |  |  |
Expiration term | 10 years |  |  |
Vesting period | 5 years |  |  |

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- Definition The period of time, from the grant date until the time at which the share-based option award expires. + References No definition available. + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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