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Common Stock Repurchase (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2014 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015 | May 02, 2017 | Apr. 26, 2016 | Oct. 28, 2014 | Oct. 29, 2013
Shares repurchased, value |  | $ 938,000 | $ 550,000 | $ 2,339,000 |  |  |  |
October 2013 authorized repurchase program |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  |  | $ 20,000,000
Shares repurchased | 287,787 |  |  |  |  |  |  |
Shares repurchased, value | $ 2,200,000 |  |  |  |  |  |  |
October 2014 authorized repurchase program |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  | $ 15,000,000 |
Shares repurchased |  |  | 0 |  |  |  |  |
April 2016 authorized repurchase program |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  | $ 15,000,000 |  |
Shares repurchased |  | 0 |  |  |  |  |  |
May 2017 authorized repurchase program |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 20,000,000 |  |  |
Shares repurchased |  | 28,691 |  |  |  |  |  |
Shares repurchased, value |  | $ 300,000 |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 19,700,000 |  |  |  |  |  |

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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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