Note 2 - Notes Payable and Long-Term Debt (Details) (USD $)	1 Months Ended					0 Months Ended	3 Months Ended	0 Months Ended	1 Months Ended
	Jul. 31, 2007	Mar. 31, 2014	Dec. 31, 2013	Jul. 31, 2007 Building [Member] Credit Agreement with JPMorgan Chase Bank, N.A. [Member] sqft	Jul. 31, 2007 Land [Member] Credit Agreement with JPMorgan Chase Bank, N.A. [Member] acre	Jul. 12, 2012 London Interbank Offered Rate (LIBOR) [Member] Line of Credit Note with JPMorgan Chase Bank, N.A.[Member]	Mar. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Line of Credit Note with JPMorgan Chase Bank, N.A.[Member]	Apr. 30, 2008 Term Note [Member] Credit Agreement with JPMorgan Chase Bank, N.A. [Member]	Jul. 31, 2007 Credit Agreement with JPMorgan Chase Bank, N.A. [Member]	Jul. 12, 2012 Line of Credit Note with JPMorgan Chase Bank, N.A.[Member]
Note 2 - Notes Payable and Long-Term Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)									$ 5,500,000	$ 4,000,000
Area of Real Estate Property				191,000	30
Line of Credit Facility Maximum Borrowing Capacity Percentage of Property									90.00%
Proceeds from Bank Debt (in Dollars)	$ 4,050,000
Debt Instrument, Term								10 years
Debt Instrument, Interest Rate, Stated Percentage		7.10%	7.10%					7.10%
Debt Instrument, Basis Spread on Variable Rate						2.00%	2.15%
Debt Instrument Amortization Period								820 years