Note 3 - Income Taxes (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Effective Income Tax Rate Reconciliation, Percent	39.80%	34.60%
Unrecognized Tax Benefits, Excluding Interest and Penalties	$ 371,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	9,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	7,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	210,000
Unrecognized Tax Benefits that Would Not Impact Effective Tax Rate	$ 161,000