Note 1 - Description of Business, Basis of Presentation and Summary of Significant Accounting Policies (Details) - Summary of Dilutive Securities - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	13,376,361	15,794,536	13,633,928	15,794,536
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	9,083,998	9,786,546	9,341,565	9,786,546
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities		1,715,627		1,715,627
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	2,812,414	2,812,414	2,812,414	2,812,414
Preferred Stock Convertible [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	1,479,949	1,479,949	1,479,949	1,479,949