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

3 Months Ended

Mar. 31, 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		March 31, 2017		December 31, 2016
Financial instruments:
Series 2023 PIK Note Derivative	$	-0-	$	-0-	$	92,341	$	92,341	$	142,909
Series A PIK Note Derivative	$	-0-	$	-0-	$	1,191,134	$	1,191,134	$	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
Issuance of additional Series 2023 Notes		2,647
Net unrealized gain included in operations		(895,724	)
Balance at March 31, 2017	$	1,283,475

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
	March 31, 2017			December 31, 2016
Market price and estimated fair value of stock	$	0.08		$	0.12
Exercise price	$	1.28		$	1.28
Term (years)		6.33			6.58
Dividend yield	$	- 0 -		$	- 0 -
Expected volatility		86.5	%		86.2	%
Risk-free interest rate		2.11	%		2.18	%

Series A PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	March 31, 2017			December 31, 2016
Market price and estimated fair value of stock	$	0.08		$	0.12
Exercise price	$	0.83		$	0.83
Term (years)		6.33			6.58
Dividend yield	$	- 0 -		$	- 0 -
Expected volatility		86.5	%		86.2	%
Risk-free interest rate		2.11	%		2.18	%