Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock	Sep. 30, 2014	Dec. 31, 2013
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	10,634,030,000	5,810,472,000
Series A Preferred Stock [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	1,700,622,000	1,426,482,000
Series A-1 Preferred Stock [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	838,101,000	687,395,000
Series B Preferred Stock [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	1,610,383,000	1,307,771,000
Series C Preferred Stock [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	1,361,809,000	1,105,907,000
Series D Preferred Stock [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	3,327,894,000
Performance Shares [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	1,135,415,000	623,111,000
Warrants To Purchase Common Stock [Member]
Note 7 - Common Stock (Details) - Reserved for Future Issuances Shares of Common Stock [Line Items]
Shares reserved for future issuance	659,806,000	659,806,000