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Net Income Per Common Share: Schedule of Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jan. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Earnings Per Share, Basic [Abstract]      
Numerator – net income   $ 3,147 $ 2,528
Denominator – weighted average common shares outstanding (in shares)   6,862,749 6,869,726
Basic net income per common share (in dollars per share)   $ 0.46 $ 0.37
Earnings Per Share, Diluted [Abstract]      
Effect of dilutive stock options (in shares) [1]   139,493 52,985
Effect of dilutive stock warrant (in shares) [2]   233,273 161,153
Weighted average common shares and common stock equivalents (in shares)   7,235,515 7,083,864
Diluted net income per common share (in dollars per share)   $ 0.43 $ 0.36
Subsequent Event      
Earnings Per Share, Diluted [Abstract]      
Shares issued for warrants exercised 370,899    
Proceeds from warrants exercised $ 2,500    
Stock Options      
Earnings Per Share, Diluted [Abstract]      
Antidilutive securities excluded from computation of earnings per share (in shares)   0 154,000
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  
[1] For the three months ended December 31, 2016 all outstanding options were included in the computation of diluted net income per share. For the three months ended December 31, 2015, average options to purchase 154,000 of common stock 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. On January 31, 2017, the Warrant was exercised and 370,899 shares of the Company's common stock were issued in exchange for $2.50 million.