Note 5 - Equity Incentive Plan (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Restricted Stock [Member]	Sep. 30, 2014 Restricted Stock [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member] Board of Directors [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2014 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2014 Stock Appreciation Rights (SARs) [Member]	Sep. 30, 2014 Minimum [Member]	Sep. 30, 2014 Maximum [Member]
Note 5 - Equity Incentive Plan (Details) [Line Items]
Allocated Share-based Compensation Expense	$ 390,578	$ 368,603	$ 1,196,361	$ 1,156,929
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	7,000		139,240
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)					0	30,700	9,365	0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						4 years			4 years		1 year	4 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	4,200,000		4,200,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			3 years
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndStockAppreciationRightsExercisesInPeriodTotalIntrinsicValue			25,473,089	4,095,833
Proceeds from Stock Options Exercised	17,513	1,804,773	1,379,294	2,932,649
Stock Repurchased and Retired During Period, Shares (in Shares)										133,774
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsOutstandingNumber (in Shares)			936,097
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsWeightedAverageExercisePrice (in Dollars per share)	$ 13.54		$ 13.54
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsOutstandingIntrinsicValue	$ 21,800,000		$ 21,800,000
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsOutstandingWeightedAverageRemainingContractualTerm			6 years 292 days
ShareBasedCompensationArrangementByShareBasedPaymentAwardContractualTermRange			10 years