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Share-Based Compensation - 2009 Stock-Based Incentive Compensation Plan (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Options |  |  |  |
Outstanding at the beginning of the period (in shares) | 589,168 |  |  |
Outstanding at the end of the period (in shares) | 586,834 | 589,168 |  |
2009 Plan |  |  |  |
Share-based compensation |  |  |  |
Number of shares of common stock reserved for awards | 1,200,000 |  |  |
Number of shares of common stock available for awards under the plan | 259,598 |  |  |
2009 Plan | Options |  |  |  |
Options |  |  |  |
Outstanding at the beginning of the period (in shares) | 626,283 | 592,168 | 625,168 |
Granted (in shares) |  | 67,115 |  |
Exercised (in shares) | (67,115) |  | (20,000) |
Cancelled (in shares) | (2,334) | (33,000) | (13,000) |
Outstanding at the end of the period (in shares) | 556,834 | 626,283 | 592,168 |
Vested and expected to vest (in shares) | 556,834 |  |  |
Options exercisable at the end of the period (in shares) | 556,834 |  |  |
Weighted Average Exercise Price |  |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ 3.27 | $ 3.35 | $ 3.28 |
Granted (in dollars per share) |  | 2.81 |  |
Exercised (in dollars per share) | 2.81 |  | 1.95 |
Cancelled (in dollars per share) | 3.78 | 3.78 | 2.37 |
Outstanding at the end of the period (in dollars per share) | 3.32 | $ 3.27 | $ 3.35 |
Vested and expected to vest (in dollars per share) | 3.32 |  |  |
Options exercisable at the end of the period (in dollars per share) | $ 3.32 |  |  |
Aggregate Intrinsic Value |  |  |  |
Granted (in dollars) |  | $ 25,504 |  |
Exercised (in dollars) | $ 55,705 |  | $ 15,200 |
Outstanding at the end of the period (in dollars) | 177,043 |  |  | $ 3,153,696
Vested and expected to vest (in dollars) | 177,043 |  |  |
Options exercisable at the end of the period (in dollars) | $ 177,043 |  |  |
2009 Plan | Performance-based Award | Employee |  |  |  |
Share-based compensation |  |  |  |
Maximum award (in shares) | 300,000 |  |  |

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- Definition The maximum award that a participant can receive, in shares, under the terms of a share based compensation plan. + References No definition available. + Details
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- Definition Represents the total fair value of options granted during the reporting period. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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=96867065&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options 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 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 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)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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=96867065&loc=d3e5070-113901 + Details
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