Note 3 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Effective Income Tax Rate Reconciliation, Percent	35.70%	35.30%	37.70%	34.90%
Unrecognized Tax Benefits, Excluding Interest and Penalties	$ 396,000		$ 396,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	10,000		10,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	7,000		7,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	210,000		210,000
Unrecognized Tax Benefits that Would Not Impact Effective Tax Rate	$ 186,000		$ 186,000