Note 3 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Stock Options And Warrants Tables

Summary of the warrant activity

	Number of Warrants			Weighted Average Exercise Price
Outstanding, December 31, 2015:		41,752		$	375.00
Granted		17,005			135.00
Forfeited		(1,173	)		375.00
Exercised		(42,034	)		375.00
Outstanding at December 31, 2016:		15,550		$	135.00
Granted		486,351			15.00
Forfeited		(339,932	)
Exercised		(501,901	)		15.00
Outstanding at December 31, 2016		—		$	—
Exercisable warrants:
December 31, 2017		—		$	—
December 31, 2016		41,752		$	375.00

Summary of the stock option activity

	Number of Options			Weighted Average Exercise Price
Outstanding, December 31, 2015		1,249		$	1,464.00
Granted		—			—
Exercised		—			—
Expired		(3	)		16,881.00
Outstanding, December 31, 2016		1,246		$	1,428.00
Granted		—			—
Exercised		—			—
Expired		—			—
Outstanding, December 31, 2017		1,246		$	1,428.00
Exercisable Options:
December 31, 2016		1,246		$	1,428.00
December 31, 2017		1,246		$	1,428.00

Summary of outstanding and exercisable stock options

	Outstanding Options				Exercisable Options
Range of Exercise Prices	Number of Options	Weighted-Average Remaining Contractual Life		Weighted-Average Exercise Price	Number of Options		Weighted-Average Exercise Price
$750.00 to $2,225.00	1,246	1.38	$	1,428.73	1,246	$	1428.73