Note 5 - Fair Value Measurements (Details) - Valuation Assumptions (USD $)	1 Months Ended	3 Months Ended
	May 31, 2013	Sep. 30, 2013	Sep. 04, 2013	Jun. 30, 2013
Valuation Assumptions [Abstract]
Common stock price (in Dollars per share)	$ 8.60	$ 5.56	$ 5.49	$ 9.00
Expected warrant exercise price (in Dollars per share)	$ 8.75		$ 7.75	$ 8.75
Remaining term of warrant (years)	5 years	3 years 76 days	4 years 9 months	4 years 335 days
Expected volatility	76.00%	59.39%	76.70%	76.00%
Average risk free interest rate	1.05%	0.73%	1.74%	1.41%