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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, 2017
Dec. 31, 2016
Earnings Per Share, Basic [Abstract]      
Numerator – net income   $ 3,614 $ 3,147
Denominator – weighted average common shares outstanding (in shares)   7,312,531 6,862,749
Basic net income per common share (in dollars per share)   $ 0.49 $ 0.46
Earnings Per Share, Diluted [Abstract]      
Effect of dilutive stock options (in shares) [1]   195,638 139,493
Effect of dilutive stock warrant (in shares) [2]   0 233,273
Weighted average common shares and common stock equivalents (in shares)   7,508,169 7,235,515
Diluted net income per common share (in dollars per share)   $ 0.48 $ 0.43
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)   14,651  
Warrant      
Earnings Per Share, Diluted [Abstract]      
Antidilutive securities excluded from computation of earnings per share (in shares)   370,899  
Number of Shares      
Earnings Per Share, Diluted [Abstract]      
Class of warrant, exercise price (in dollars per share)   $ 6.73  
[1] For the three months ended December 31, 2017, average options to purchase 14,651 shares 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. For the three months ended December 31, 2016, all outstanding options were included in the computation of diluted net income per share.
[2] Represented 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.