Note 6 - Notes Payable And Long-Term Debt (Details) (USD $)					0 Months Ended	12 Months Ended	0 Months Ended		7 Months Ended		1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2007 Building [Member] Credit Agreement [Member] JPMorgan Chase Bank [Member] sqft	Jul. 31, 2007 Land [Member] Credit Agreement [Member] JPMorgan Chase Bank [Member] acre	Jul. 12, 2012 London Interbank Offered Rate (LIBOR) [Member] Line of Credit Note [Member] JPMorgan Chase Bank [Member]	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Line of Credit Note [Member] JPMorgan Chase Bank [Member]	Apr. 30, 2008 Medium-term Notes [Member] JPMorgan Chase Bank [Member]	Jul. 31, 2007 Credit Agreement [Member] JPMorgan Chase Bank [Member]	Jul. 31, 2007 Line of Credit Note [Member] JPMorgan Chase Bank [Member]	Jul. 12, 2012 Line of Credit Note [Member] JPMorgan Chase Bank [Member]	Jul. 31, 2007 JPMorgan Chase Bank [Member]	Dec. 31, 2013 JPMorgan Chase Bank [Member]
Note 6 - Notes Payable And Long-Term Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 5,500,000		$ 4,000,000
Area of Real Estate Property			191,000	30
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases									5,500,000
Line Of Credit Facility Covenant Percentage									90.00%
Debt Instrument, Term							10 years
Debt Instrument, Interest Rate, Stated Percentage	7.10%	7.10%					7.10%
Proceeds from Bank Debt											4,050,000
Minimum Debt Service Coverage Ratio												1.2
Debt Instrument, Basis Spread on Variable Rate					2.00%	2.2442%
Line of Credit Facility, Amount Outstanding												$ 0