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Note 5 - Investment Securities - Available For Sale (Detail) - Short-term Investment - Continuous Unrealized Loss Position (Debt Securities [Member], USD $)	Mar. 31, 2013	Dec. 31, 2012
Debt Securities [Member]
Available for Sale
Bonds – corporate issuances (all unrealized holding losses are less than 12 months at date of measurement)	$ 25,202,875
Bonds – corporate issuances (all unrealized holding losses are less than 12 months at date of measurement)	(158,556)
Bonds – corporate issuances (all unrealized holding losses are less than 12 months at date of measurement)		(126,607)
Bonds – corporate issuances (all unrealized holding losses are less than 12 months at date of measurement)		$ 8,037,620

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References+ Details

- Definition

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.

+ References+ Details