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Net Income Per Common Share: Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Earnings Per Share, Basic [Abstract] |  |  |  |  |
Numerator – net income |  | $ 2,547 | $ 2,159 | $ 7,455 | $ 5,337
Denominator – weighted average common shares outstanding (in shares) |  | 6,822,608 | 6,902,067 | 6,846,373 | 6,897,381
Basic net income per common share (in dollars per share) |  | $ 0.37 | $ 0.31 | $ 1.09 | $ 0.77
Earnings Per Share, Diluted [Abstract] |  |  |  |  |
Effect of dilutive stock options (in shares) | [1] | 93,041 | 36,490 | 69,291 | 36,680
Effect of dilutive stock warrant (in shares) | [2] | 195,550 | 132,664 | 175,997 | 134,760
Weighted average common shares and common stock equivalents (in shares) |  | 7,111,199 | 7,071,221 | 7,091,661 | 7,068,821
Diluted net income per common share (in dollars per share) |  | $ 0.36 | $ 0.31 | $ 1.05 | $ 0.76
Stock Options |  |  |  |  |
Earnings Per Share, Diluted [Abstract] |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) |  |  | 172,945 | 56,358 | 138,982
Warrant |  |  |  |  |
Earnings Per Share, Diluted [Abstract] |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) |  |  |  | 370,899 |
Common Stock |  |  |  |  |
Earnings Per Share, Diluted [Abstract] |  |  |  |  |
Class of warrant, exercise price (in dollars per share) |  | $ 6.73 |  | $ 6.73 |
[1] | or the nine months ended June 30, 2016, average options to purchase 56,358 shares of common stock were outstanding but not included in the computation of diluted net income per share because their effect would have been anti-dilutive. For the three months ended June 30, 2016 all outstanding options were included in the computation of diluted net income per share. For the three and nine months ended June 30, 2015, average options to purchase 172,945 and 138,982 shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per common share because their effect would have been anti-dilutive.
[2] | Represents a warrant to purchase 370,899 shares of the Company's common stock at an exercise price of $6.73 per share (subject to anti-dilution adjustments) at any time through December 23, 2018 (the "Warrant"). The Warrant was granted on December 23, 2008 to the U.S. Treasury Department ("Treasury") as part of the Company's participation in the Treasury's Troubled Asset Relief Program ("TARP"). On June 12, 2013, the Treasury sold the Warrant to private investors.

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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