Note 2 - Notes Payable and Long-term Debt - Summary of Credit Agreement and Line of Credit Note (Details) (Parentheticals) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Credit Agreement with JPMorgan Chase Bank, N.A. [Member]
Line of Credit Note term	10 years	10 years
Line of Credit Note monthly principal payments	$ 16,875	$ 16,875
Line of Credit Note interest	7.10%	7.10%
Line of Credit Note with JPMorgan Chase Bank, N.A.[Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Note, Interest at LIBOR	2.00%	2.00%
Line of Credit Note with JPMorgan Chase Bank, N.A.[Member]
Line of Credit Note, Principal Amount	$ 6,000,000	$ 6,000,000