Note 12 - Equity Incentive Plan (Details) - Stock Options and SAR’s Activity (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Stock Options and SAR’s Activity [Abstract]
Options and SAR's outstanding at beginning of year	1,513,326	1,793,685
Options and SAR's outstanding at beginning of year	$ 9.14	$ 8.30
Options and SAR's outstanding at end of year	851,287	1,513,326
Options and SAR's outstanding at end of year	$ 14.85	$ 9.14
Granted	179,240	413,500
Granted	$ 35.62	$ 12.55
Cancelled	(53,325)	(243,724)
Cancelled	$ 23.73	$ 8.77
Expired	(24,292)	(9,928)
Expired	$ 9.87	$ 9.62
Exercised	(763,662)	(440,207)
Exercised	$ 7.95	$ 8.71