Note 12 - Income Taxes (Tables)

12 Months Ended

Nov. 30, 2013

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	November 30
	2013			2012
Current expense	$	765,606		$	1,364,661
Deferred expense(benefit)		(111,138	)		(41,721	)
	$	654,468		$	1,322,940

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	November 30
	2013			2012
Statutory federal income tax rate		34.0	%		34.0%
R & D tax credits		(1.0	)		(2.0	)
Permanent Differences and Other		(3.3	)		1.2
		29.7	%		33.2	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	November 30
	2013			2012
Current deferred tax assets (liabilities):
Accrued expenses	$	168,000		$	254,000
Inventory capitalization		24,000			8,000
Asset reserves		1,036,000			800,000
Total current deferred tax assets	$	1,228,000		$	1,062,000
Non-current deferred tax assets (liabilities):
Property, plant, and equipment	$	(953,000	)	$	(897,000	)
Total non-current deferred tax assets (liabilities)	$	(953,000	)	$	(897,000	)