Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details) - Option Activity (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Option Activity [Abstract]
Outstanding as of	410,127	286,188
Outstanding as of	$ 9.70	$ 15.30
Outstanding as of	7 years 219 days
Vested and expected to vest as of June 30, 2014	372,885
Vested and expected to vest as of June 30, 2014	$ 8.59
Vested and expected to vest as of June 30, 2014	8 years 146 days
Exercisable as of June 30, 2014	207,818
Exercisable as of June 30, 2014	$ 14.83
Exercisable as of June 30, 2014	7 years 73 days
Granted	208,000
Granted	$ 4.34
Exercised	(500)
Exercised	$ 2.30
Cancelled/forfeited	(83,561)
Cancelled/forfeited	$ 15.61