Note 6 - Notes Payable And Long-Term Debt (Detail) (USD $)	0 Months Ended	1 Months Ended	7 Months Ended	25 Months Ended
	Apr. 30, 2008	Jul. 31, 2007	Jul. 31, 2007	Jul. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Jul. 31, 2007 Building [Member] sqft	Jul. 31, 2007 Land [Member] acre	Dec. 31, 2012 JPMorgan Chase Bank [Member]	Jul. 12, 2012 JPMorgan Chase Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)		$ 5,500,000	$ 5,500,000							$ 4,000,000
Area of Real Estate Property (in Square feet)							191,000	30
Area of Real Estate Property (in Acres)							191,000	30
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases (in Dollars)		5,500,000	5,500,000
Line Of Credit Facility Covenant Percentage			90.00%
Debt Instrument Maturity Period	10 years
Debt Instrument, Interest Rate, Stated Percentage	7.10%				7.10%	7.10%
Proceeds from Bank Debt (in Dollars)		$ 4,050,000
Line of Credit Facility, Covenant Terms				1.2 to 1.0
Debt Instrument, Basis Spread on Variable Rate									2.2087%	2.00%