Note 5 - Investment Securities - Available For Sale (Details) - Short-Term Investment by Bond Maturities (USD $)	Jun. 30, 2014	Dec. 31, 2013
Corporate bond maturities
Cost	$ 40,182,887	$ 37,200,576
Fair value	40,171,059	37,156,381
Corporate Bond Maturing Within 3 Months [Member]
Corporate bond maturities
Cost	7,817,919	7,799,032
Fair value	7,817,694	7,797,689
Corporate Bond Maturing Between 3 and 12 Months [Member]
Corporate bond maturities
Cost	32,364,968	29,401,543
Fair value	$ 32,353,365	$ 29,358,692