Note 6 - Derivative Obligations (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

	Series A
	June 30, 2018			December 31, 2017
Market price of common stock	$	0.42		$	3.00
Expected volatility		111.2	%		107	%
Contractual term (years)		2.7			3.2
Discount rate		2.60	%		1.99	%
Dividend rate		0	%		0	%
Exercise price	$	8.00		$	8.00

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	Derivative Obligation
	June 30, 2018		December 31, 2017
Balance	$	30,000	$	597,000
Level 1	$	-	$	-
Level 2	$	-	$	-
Level 3	$	30,000	$	597,000

Derivative Instruments, Gain (Loss) [Table Text Block]

	Amount
Balance – December 31, 2017	$	597,000
Change in fair value of derivative obligation		(567,000	)
Balance – June 30, 2018	$	30,000