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Share-Based Compensation - Stock option plan (Details) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 25, 2013 $ / shares | Mar. 31, 2013 USD ($) | Sep. 30, 2016 USD ($) item | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($)
Share-based compensation |  |  |  |  |
Share-based compensation expense |  |  | $ 251,000 | $ 466,000 | $ 810,000
Income tax effect recognized as a charge to additional paid-in capital related to share-based compensation |  |  | $ (8,000) | (54,000) | (253,000)
Number of share-based compensation plans maintained by the company | item |  |  | 3 |  |
Options |  |  |  |  |
Share-based compensation |  |  |  |  |
Reduction in applicable option exercise price of each outstanding option (in dollars per share) | $ / shares | $ 1.50 |  |  |  |
1998 Plan |  |  |  |  |
Share-based compensation |  |  |  |  |
Share-based compensation expense |  |  | $ 0 | 0 | 0
1998 Plan | Options |  |  |  |  |
Share-based compensation |  |  |  |  |
Unrecognized compensation cost, related to non-vested stock options |  |  | 0 |  |
2009 Plan |  |  |  |  |
Share-based compensation |  |  |  |  |
Share-based compensation expense |  |  | 68,000 | $ 316,000 | $ 660,000
2009 Plan | Options |  |  |  |  |
Share-based compensation |  |  |  |  |
Share-based compensation expense |  | $ 22,000 |  |  |
Unrecognized compensation cost, related to non-vested stock options |  | $ 59,000 | $ 0 |  |

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- Definition Represents the number of plans of share-based compensation arrangements maintained by the entity. + References No definition available. + Details
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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP). + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + 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.F) -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 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + 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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Change in the weighted average exercise price of options outstanding. + References No definition available. + Details
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- Details
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