Note 14 - Employee Benefit Plans - Profit Sharing Contributions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Matching contribution	$ 1,365,111	$ 1,314,276	$ 1,179,979
Discretionary contribution			198,800
	$ 1,365,111	$ 1,314,276	$ 1,378,779