Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
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)
Total other comprehensive income (loss), net of tax				765		765
Net income (loss)			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
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 and 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 income (loss), net of tax				2,715		2,715
Net income (loss)			(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 and 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 income (loss), net of tax				(5,536)		(5,536)
Net income (loss)			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