Note 3 - Basis of Reporting and Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

	Fair value measurement using inputs						Carrying amount
	Level 1		Level 2		Level 3		September 30, 2017		December 31, 2016
Financial instruments:
Series 2023 PIK Note Derivative	$	-0-	$	-0-	$	68,041	$	68,041	$	142,909
Series A PIK Note Derivative	$	-0-	$	-0-	$	1,074,133	$	1,074,133	$	2,033,643

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Balance at December 31, 2016	$	2,176,552
Additions related to the i ssuance of PIK Notes		31,990
Net unrealized gains included in net (loss)		(1,066,368	)
Balance at September 30, 2017	$	1,142,174

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

Series 2023 PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	September 30, 2017			December 31, 2016
Market price and estimated fair value of stock	$	0.04		$	0.12
Exercise price	$	1.14		$	1.28
Term (years)		5.83			6.58
Dividend yield	$	-0-		$	-0-
Expected volatility		107.7	%		86.2	%
Risk-free interest rate		2.02	%		2.18	%

Series A PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	September 30, 2017			December 31, 2016
Market price and estimated fair value of stock	$	0.04		$	0.12
Exercise price	$	0.66		$	0.83
Term (years)		5.83			6.58
Dividend yield	$	-0-		$	-0-
Expected volatility		107.7	%		86.2	%
Risk-free interest rate		2.02	%		2.18	%