Note 9 - Stock-Based Compensation (Details) - Non-Vested Restricted Stock Options (USD $)	6 Months Ended
	Jun. 30, 2014
Note 9 - Stock-Based Compensation (Details) - Non-Vested Restricted Stock Options [Line Items]
Granted	108,860
Granted (in Dollars per share)	$ 32.73
Restricted Stock [Member]
Note 9 - Stock-Based Compensation (Details) - Non-Vested Restricted Stock Options [Line Items]
Nonvested restricted stock at December 31, 2013	0
Nonvested restricted stock at December 31, 2013 (in Dollars per share)	$ 0
Granted	74,137
Granted (in Dollars per share)	$ 69.42
Vested	0
Forfeited	0
Nonvested restricted stock at June 30, 2014	74,137
Nonvested restricted stock at June 30, 2014 (in Dollars per share)	$ 69.42