Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Total
Balance at beginning of period at Nov. 30, 2014	$ 55	$ 107,887	$ 2,238	$ (835)	$ (13,466)	$ 95,879
Balance (in shares) at Nov. 30, 2014	5,537,895
Increase (Decrease) in Stockholders' Equity
Exercise of stock options, net of reversal of tax benefit on exercised stock options		71				71
Exercise of stock options (shares)	3,134
Stock-based compensation		230				230
Dividends declared			(1,546)			(1,546)
Total other comprehensive income (loss), net of tax				(250)		(250)
Net income			425			425
Balance at end of period at Nov. 30, 2015	$ 55	108,188	1,117	(1,085)	(13,466)	94,809
Balance (in shares) at Nov. 30, 2015	5,541,029
Increase (Decrease) in Stockholders' Equity
Repurchase of common stock					(3,354)	(3,354)
Reversal of tax benefit on forfeited stock options		(17)				(17)
Stock-based compensation		267				267
Dividends declared			(1,514)			(1,514)
Total other comprehensive income (loss), net of tax				36		36
Net income			576			576
Balance at end of period at Nov. 30, 2016	$ 55	108,438	179	(1,049)	(16,820)	90,803
Balance (in shares) at Nov. 30, 2016	5,541,029
Balance at beginning of period at Nov. 30, 2015	$ 55	108,188	1,117	(1,085)	(13,466)	94,809
Balance (in shares) at Nov. 30, 2015	5,541,029
Balance at end of period at Nov. 30, 2017	$ 55	108,770	2,806	(284)	(18,294)	93,053
Balance (in shares) at Nov. 30, 2017	5,541,029
Balance at beginning of period at Nov. 30, 2016	$ 55	108,438	179	(1,049)	(16,820)	90,803
Balance (in shares) at Nov. 30, 2016	5,541,029
Increase (Decrease) in Stockholders' Equity
Repurchase of common stock					(1,474)	(1,474)
Reversal of tax benefit on forfeited stock options		(17)				(17)
Stock-based compensation		349				349
Dividends declared			(2,000)			(2,000)
Total other comprehensive income (loss), net of tax				765		765
Net income			4,627			4,627
Balance at end of period at Nov. 30, 2017	$ 55	$ 108,770	$ 2,806	$ (284)	$ (18,294)	$ 93,053
Balance (in shares) at Nov. 30, 2017	5,541,029