Note 7 - Embedded Derivatives (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Defined Benefit Plan, Assumptions [Table Text Block]

	December 31,			December 31,
	201 9			201 8
Stock price	$	2.31		$	1.96
Conversion Rate	$	67.95		$	67.95
Conversion Price	$	14.72		$	14.72
Maturity date		March 15, 2020			March 15, 2020
Risk-free interest rate		1.52	%		2.57	%
Estimated stock volatility		60	%		150	%
Estimated credit spread		27	%		31	%