Note 12 - Equity Incentive Plan (Detail) - Option Activity (USD $)	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
Options outstanding at beginning of period	153,000	155,500
Options outstanding at beginning of period (in Dollars per share)	$ 9.32	$ 8.85
Granted, shares	14,000	21,000
Granted, weighted-average exercise price (in Dollars per share)	$ 6.75	$ 7.40
Exercised, shares	(2,000)	(17,500)
Exercised, weighted-average exercise price (in Dollars per share)	$ 4.56	$ 4.25
Exercised, aggregate intrinsic value (in Dollars)	$ 5,660	$ 96,060
Options Expired or Forfeited, shares	(2,000)	(6,000)
Options Expired or Forfeited, weighted-average exercise price (in Dollars per share)	$ 8.66	$ 5.01
Options outstanding at end of period	163,000	153,000
Options outstanding at end of period (in Dollars per share)	$ 9.16	$ 9.32
Options outstanding at end of period	5 years 219 days	7 years 43 days
Options outstanding at end of period (in Dollars)	34,700	46,590
Options exercisable, shares	163,000	153,000
Options exercisable, weighted-average exercise price (in Dollars per share)	$ 9.16	$ 9.32
Options exercisable, weighted-average remaining contractual term	5 years 219 days	7 years 43 days
Options exercisable, aggregate intrinsic value (in Dollars)	$ 34,700	$ 46,590