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, 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
Stock-based compensation expense		267				267
Repurchase of common stock					(3,354)	(3,354)
Reversal of tax benefit on forfeited stock options		(17)				(17)
Dividends declared			(1,514)			(1,514)
Net income (loss)			576			576
Total other comprehensive income, net of tax				36		36
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
Stock-based compensation expense		349				349
Repurchase of common stock					(1,474)	(1,474)
Reversal of tax benefit on forfeited stock options		(17)				(17)
Dividends declared			(2,000)			(2,000)
Net income (loss)			4,627			4,627
Total other comprehensive income, net of tax				765		765
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
Increase (Decrease) in Stockholders' Equity
Stock-based compensation expense		350				350
Exercise of stock options, including shares tendered related to stock options exercised and tax witholdings	$ 1	2,951			(1,189)	1,763
Exercise of stock options, including and shares tendered related to stock options exercised and tax witholdings (in shares)	94,677
Dividends declared			(2,279)			(2,279)
Net income (loss)			(1,653)			(1,653)
Total other comprehensive income, net of tax				2,715		2,715
Balance at end of period at Nov. 30, 2018	$ 56	$ 112,071	(211)	2,395	$ (19,483)	94,828
Balance (in shares) at Nov. 30, 2018	5,635,706
Increase (Decrease) in Stockholders' Equity
Adoption of ASU | ASU 2016-09			879			$ 879
Adoption of ASU | ASU 2018-02			$ 36	$ (36)