Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Cumulative effect and reclassification Retained Earnings	Cumulative effect and reclassification Accumulated Other Comprehensive Loss	Cumulative effect and reclassification	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Total
Balance at beginning 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
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings				$ 1	2,951			(1,189)	1,763
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings (in shares)				94,677
Stock-based compensation expense					350				350
Dividends declared						(2,279)			(2,279)
Total other comprehensive loss, net of tax							2,715		2,715
Net (loss) income						(1,653)			(1,653)
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)
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings				$ 1	924			(846)	79
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings (in shares)				32,337
Stock-based compensation expense					261				261
Dividends declared						(2,538)			(2,538)
Total other comprehensive loss, net of tax							(5,536)		(5,536)
Net (loss) income						3,668			3,668
Balance at end of period at Nov. 30, 2019				$ 57	113,256	919	(3,141)	(20,329)	90,762
Balance (in shares) at Nov. 30, 2019				5,668,043
Increase (Decrease) in Stockholders' Equity
Adoption of ASU									919
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings				$ 1	1,569			(1,358)	212
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings (in shares)				54,930
Sale of Common stock				$ 5	23,037				23,042
Sale of common stock				557,883
Stock-based compensation expense					510				510
Total other comprehensive loss, net of tax							(4,910)		(4,910)
Net (loss) income						(12,717)			(12,717)
Balance at end of period at Nov. 30, 2020				$ 63	$ 138,372	$ (11,798)	$ (8,051)	$ (21,687)	96,899
Balance (in shares) at Nov. 30, 2020				6,280,856
Increase (Decrease) in Stockholders' Equity
Adoption of ASU									$ (11,798)