Note 2 - Summary of Significant Accounting Policies (Details) - Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation - Fair Value, Inputs, Level 3 [Member] - USD ($)	3 Months Ended					12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Issuance	$ (19,408)	$ (2,212,707)				$ 5,659,866
Adjustment resulting from change in value recognized in earnings (a)	17,644	1,722,097	[1]	$ (972,645)	[1]	(4,194,847)	[1]
Balance	1,764	492,374		1,465,019
Balance	$ 0	$ 1,764		$ 492,374		$ 1,465,019

[1] Adjustment resulting from change in fair value is the amount of total gains or losses for the period attributable to the change in unrealized gains or losses relating to liabilities held at the reporting date. The unrealized gain or loss is recorded in change in fair value of warrant liability in the accompanying consolidated statements of operations.