Note 8 - Derivative Obligations (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	December 31, 2018		December 31, 2017		June 30, 2017
Market price of common stock		$0.27		$3.00		$3.17
Expected volatility		94%		107%		110%
Contractual term (years)		2.2		3.2		3.7
Discount rate		2.48%		1.99%		1.66%
Dividend rate		0%		0%		0%
Exercise price		$8.00		$8.00		$8.00

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

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

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

	Amount
Balance – June 30, 2017	$	730,000
Change in fair value of derivative obligation		(133,000	)
Balance – December 31, 2017		597,000
Change in fair value of derivative obligation		(596,000	)
Balance – December 31, 2018	$	1,000