Note 7 - Derivative Obligations (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

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

	Series A
	March 31, 2019	December 31, 2018
Market price of common stock	$0.29	$0.27
Expected volatility	96%	94%
Contractual term (years)	1.9	2.2
Discount rate	2.28%	2.48%
Dividend rate	0%	0%
Exercise price	$8.00	$8.00

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

	Derivative Obligation
	March 31, 2019	December 31, 2018
Balance	$1,000	$1,000
Level 1	$-	$-
Level 2	$-	$-
Level 3	$1,000	$1,000

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

	Amount
Balance – December 31, 2018	$	1,000
Change in fair value of derivative obligation		--
Balance – March 31, 2019	$	1,000