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, 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		178				178
Exercise of stock options, including shares tendered related to stock options exercised and tax witholdings	$ 1	1,208			(721)	488
Exercise of stock options, including and shares tendered related to stock options exercised and tax withholdings (in shares)	36,823
Net loss			(1,392)			(1,392)
Total other comprehensive income, net of tax				2,294		2,294
Balance at end of period at May. 31, 2018	$ 56	110,156	2,329	1,974	(19,015)	95,500
Balance (in shares) at May. 31, 2018	5,577,852
Increase (Decrease) in Stockholders' Equity
Adoption of ASU | ASU 2016-09			879			879
Adoption of ASU | ASU 2018-02			36	(36)
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 witholdings	$ 1	856			(846)	11
Exercise of stock options, including and shares tendered related to stock options exercised and tax withholdings (in shares)	29,838
Net loss			5,233			5,233
Total other comprehensive income, 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