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Share-Based Compensation: (Details 2) (Stock options, USD $) | 12 Months Ended
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Sep. 30, 2012
1998 Plan |
Information about stock options, by exercise price range |
Options outstanding at the end of the period (in shares) | 376,200
Options Outstanding - Weighted-Average Remaining Contractual Life | 1 year 10 months 24 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 8.62
Options exercisable at the end of the period (in shares) | 366,200
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 8.64
1998 Plan | Range of Exercise Price - $ - - $ 5.00 |
Information about stock options, by exercise price range |
Exercise price, high end of range (in dollars per share) | $ 5.00
Options outstanding at the end of the period (in shares) | 181,800
Options Outstanding - Weighted-Average Remaining Contractual Life | 7 months 6 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 4.21
Options exercisable at the end of the period (in shares) | 181,800
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 4.21
1998 Plan | Range of Exercise Price - $ 5.01 - $ 10.00 |
Information about stock options, by exercise price range |
Exercise price, low end of range (in dollars per share) | $ 5.01
Exercise price, high end of range (in dollars per share) | $ 10.00
Options outstanding at the end of the period (in shares) | 101,400
Options Outstanding - Weighted-Average Remaining Contractual Life | 3 years 3 months 18 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 7.60
Options exercisable at the end of the period (in shares) | 91,400
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 7.58
1998 Plan | Range of Exercise Price - $ 10.01 - $ 15.00 |
Information about stock options, by exercise price range |
Exercise price, low end of range (in dollars per share) | $ 10.01
Exercise price, high end of range (in dollars per share) | $ 15.00
Options outstanding at the end of the period (in shares) | 47,500
Options Outstanding - Weighted-Average Remaining Contractual Life | 2 years 6 months
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 13.62
Options exercisable at the end of the period (in shares) | 47,500
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 13.62
1998 Plan | Range of Exercise Price - $ 15.01 - $ 20.00 |
Information about stock options, by exercise price range |
Exercise price, low end of range (in dollars per share) | $ 15.01
Exercise price, high end of range (in dollars per share) | $ 20.00
Options outstanding at the end of the period (in shares) | 12,000
Options Outstanding - Weighted-Average Remaining Contractual Life | 2 years 6 months
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 16.93
Options exercisable at the end of the period (in shares) | 12,000
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 16.93
1998 Plan | Range of Exercise Price - $ 20.01 - $ 27.00 |
Information about stock options, by exercise price range |
Exercise price, low end of range (in dollars per share) | $ 20.01
Exercise price, high end of range (in dollars per share) | $ 27.00
Options outstanding at the end of the period (in shares) | 33,500
Options Outstanding - Weighted-Average Remaining Contractual Life | 4 years 3 months 18 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 25.57
Options exercisable at the end of the period (in shares) | 33,500
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 25.57
2009 Plan |
Information about stock options, by exercise price range |
Options outstanding at the end of the period (in shares) | 460,000
Options Outstanding - Weighted-Average Remaining Contractual Life | 9 years 2 months 12 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 4.45
Options exercisable at the end of the period (in shares) | 60,003
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 5.28
2009 Plan | Range of Exercise Price - $ - - $ 5.00 |
Information about stock options, by exercise price range |
Exercise price, high end of range (in dollars per share) | $ 5.00
Options outstanding at the end of the period (in shares) | 280,000
Options Outstanding - Weighted-Average Remaining Contractual Life | 9 years 4 months 24 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 3.92
2009 Plan | Range of Exercise Price - $ 5.01 - $ 10.00 |
Information about stock options, by exercise price range |
Exercise price, low end of range (in dollars per share) | $ 5.01
Exercise price, high end of range (in dollars per share) | $ 10.00
Options outstanding at the end of the period (in shares) | 180,000
Options Outstanding - Weighted-Average Remaining Contractual Life | 8 years 10 months 24 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share) | $ 5.28
Options exercisable at the end of the period (in shares) | 60,003
Options Exercisable - Weighted-Average Exercise Price (in dollars per share) | $ 5.28

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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a, b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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