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, 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
Stock-based compensation expense		184				184
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings	$ 1	856			(846)	11
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings (in shares)	29,838
Net (loss) income			5,233			5,233
Total other comprehensive loss, net of tax				(4,186)		(4,186)
Balance at end of period at May. 31, 2019	$ 57	113,111	5,022	(1,791)	(20,329)	96,070
Balance (in shares) at May. 31, 2019	5,665,544
Balance at beginning 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
Stock-based compensation expense		260				260
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings		80				80
Exercise of stock options, including shares tendered related to stock options exercised and tax withholdings (in shares)	2,734
Sale of Common stock		2,500				2,500
Sale of common stock	53,293
Net (loss) income			(1,013)			(1,013)
Total other comprehensive loss, net of tax				(4,925)		(4,925)
Balance at end of period at May. 31, 2020	$ 57	$ 116,096	$ (94)	$ (8,066)	$ (20,329)	$ 87,664
Balance (in shares) at May. 31, 2020	5,724,070