Note 4 - Debt Obligations (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2017

Dec. 31, 2016

Notes Tables

Schedule of Debt [Table Text Block]

	DECEMBER 31,  201 6		MARCH 3 1 ,  201 7
Current liabilities:
Convertible notes, mature July 8, 2017	$	280,000	$	—
Line of credit, matures December 1, 2017		50,000		50,000
Convertible notes, mature December 30, 2017		280,000		280,000
Subtotal:	$	610,000	$	330,000
Long-term liabilities:
Convertible notes, mature June 1, 2018		4,800,097		4,680,097
Line of credit, matures March 31, 2019		—		175,000
Convertible notes, mature September 17, 2019		283,571		283,571
Convertible notes, mature December 31, 2019		167,000		292,000
Subtotal:	$	5,250,668	$	5,430,668
Total:	$	5,860,668	$	5,760,668

	DECEMBER 31, 2015		DECEMBER 31, 2016
Convertible notes, mature June 1, 2018	$	3,245,972	$	4,800,097
Convertible notes, mature September 17, 2019		—		283,571
Convertible notes, mature July 8, 2017		—		280,000
Convertible notes, mature December 30, 2017		—		280,000
Convertible notes, mature December 31, 2019		—		167,000
Line of credit, matures December 1, 2017		—		50,000
Total	$	3,245,972	$	5,860,668

Convertible Debt [Table Text Block]

Unit/ Conversion Price		Warrant Exercise Price		Aggregate Outstanding
$	0.25	$	0.40	$	1,652,384
$	0.35	$	0.45		1,881,046
$	0.55	$	0.70		1,146,667
				$	4,680,097

Pricing Supplement	Conversion Price		Warrant Exercise Price		Aggregate Investments
No. 1	$	0.25	$	0.40	$	460,000
No. 2	$	0.25	$	0.40		1,100,000
No. 3	$	0.35	$	0.45		1,546,713
No. 4	$	0.35	$	0.45		550,000
No. 5	$	0.55	$	0.70		1,155,000
					$	4,811,713