Stockholders' Equity - Stock Option Grants, Activity And Expense (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Nov. 30, 2016 USD ($) individual $ / shares shares	Nov. 30, 2015 USD ($) $ / shares shares	Nov. 30, 2014 USD ($) $ / shares shares
Unrecognized compensation expense related to non-vested stock options that will be recognized during future periods
Fiscal 2017 | $	$ 311
Fiscal 2018 | $	279
Fiscal 2019 | $	198
Fiscal 2020 | $	102
Fiscal 2021 | $	$ 28
Activity under the 2009 Stock Option Plan
Exercised (in shares)	0
Weighted Avg. Exercise Price
Intrinsic value of options exercised (in dollars) | $		$ 18	$ 10
Other Disclosures
Total grant date fair value of options vested | $	$ 457	$ 492	$ 664
Non-employee directors
2009 Stock Option Plan
Granted (in shares)	8,409	8,282	8,532
Fair values of stock options granted (in dollars per share) | $ / shares	$ 11.30	$ 14.39	$ 12.42
Activity under the 2009 Stock Option Plan
Granted (in shares)	8,409	8,282	8,532
Employee [Member]
2009 Stock Option Plan
Granted (in shares)	101,450
Activity under the 2009 Stock Option Plan
Granted (in shares)	101,450
2009 Stock Option Plan
2009 Stock Option Plan
Granted (in shares)	109,859	8,282	8,532
Activity under the 2009 Stock Option Plan
Outstanding at beginning of period (in shares)	225,727	222,001	239,677
Granted (in shares)	109,859	8,282	8,532
Exercised (in shares)		(3,134)	(3,208)
Forfeited (in shares)	(11,040)	(1,422)	(23,000)
Outstanding at end of period (in shares)	324,546	225,727	222,001
Weighted Avg. Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 30.47	$ 30.35	$ 30.35
Granted (in dollars per share) | $ / shares	26.83	31.38	28.12
Exercised (in dollars per share) | $ / shares		25.53	24.94
Forfeited (in dollars per share) | $ / shares	30.73	28.12	30.27
Outstanding at end of period (in dollars per share) | $ / shares	$ 29.23	$ 30.47	$ 30.35
Other Disclosures
Number of options that may be exercised as stock appreciation rights	0
2009 Stock Option Plan | Employee and directors' stock options
2009 Stock Option Plan
Number of shares authorized	386,926
Expiration term	10 years
Granted (in shares)	109,859	8,282	8,532
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)		40.80%	38.90%
Range of risk free interest rate (as a percent)		2.00%	2.20%
Expected option term (in years)		8 years 6 months	8 years 6 months
Annual dividend yield (as a percent)	0.90%	0.70%	0.70%
Other Disclosures
Number of option holders | individual	31
Compensation expense for stock options
Compensation expense (benefit) | $	$ 267	$ 230	$ 208
Related tax benefit (expense) | $	$ 62	$ 61	$ 63
Forfeiture rates (as a percent)	0.00%	0.00%	0.00%
Activity under the 2009 Stock Option Plan
Granted (in shares)	109,859	8,282	8,532
Minimum | Employee [Member]
2009 Stock Option Plan
Fair values of stock options granted (in dollars per share) | $ / shares	$ 7.51
Minimum | 2009 Stock Option Plan | Employee [Member]
Compensation expense for stock options
Forfeiture rates (as a percent)	38.30%	38.30%	38.30%
Minimum | 2009 Stock Option Plan | Employee and directors' stock options
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)	32.90%
Range of risk free interest rate (as a percent)	1.20%
Expected option term (in years)	5 years
Compensation expense for stock options
Forfeiture rates (as a percent)	17.90%	17.90%	17.90%
Maximum | Employee [Member]
2009 Stock Option Plan
Fair values of stock options granted (in dollars per share) | $ / shares	$ 11.65
Maximum | 2009 Stock Option Plan | Employee [Member]
Compensation expense for stock options
Forfeiture rates (as a percent)	41.10%	41.10%	41.10%
Maximum | 2009 Stock Option Plan | Employee and directors' stock options
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)	41.10%
Range of risk free interest rate (as a percent)	1.50%
Expected option term (in years)	8 years 6 months
Compensation expense for stock options
Forfeiture rates (as a percent)	22.60%	22.60%	22.60%
Continuing operations | 2009 Stock Option Plan | Employee and directors' stock options
Compensation expense for stock options
Compensation expense (benefit) | $	$ 267	$ 230	$ 338
Related tax benefit (expense) | $	$ 62	$ 61	78
Discontinued operations. | 2009 Stock Option Plan | Employee and directors' stock options
Compensation expense for stock options
Compensation expense (benefit) | $			(130)
Related tax benefit (expense) | $			$ (15)