Note 8 - Income taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 905,000	$ 861,000	$ (12,869,000)	$ 2,411,000
Effective Income Tax Rate Reconciliation, Percent	31.00%		31.00%