Note 10 - Common Stock Purchase Agreement with Aspire Capital (Details) (Aspire Capital [Member], USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	0 Months Ended	6 Months Ended
	Aug. 07, 2014 Subsequent Event [Member]	May 16, 2014	Jun. 30, 2014
Note 10 - Common Stock Purchase Agreement with Aspire Capital (Details) [Line Items]
Common Stock, Value, Subscriptions		$ 15.0
Common Stock Purchase Agreement Term		30 months
Development Stage Entities, Stock Issued, Shares, Issued for Noncash Consideration (in Shares)		90,635
Stock Issued During Period, Shares, New Issues (in Shares)	0	604,230
Share Price (in Dollars per share)		$ 3.31
Proceeds from Issuance of Common Stock		1.9
Issuance Cost for Purchase Agreement		0.1
Minimum Price Per Share To Retain Stock Purchase Direction Right (in Dollars per share)			$ 2.00
Additional Common Shares To Be Purchased At Reporting Entity's Direction, Value			$ 13