Note 10 - Stock Options (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	For the T hree M onths E nded					For the Nine Months Ended
	September 30,					September 30,
	2016			2015		2016			2015
Expected volatility	81%	-	104%		-	81%	-	102%	107	-	109%
Risk-free interest rate	0.6%	-	0.9%		-	0.9%	-	1.2%	0.75	-	0.86%
Forfeiture rate			0%		-			0%			0%
Dividend yield			-		-			-			-
Expected term (in years)	0.1	-	3.3		-	3.1	-	3.5			3.4

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding at December 31 , 2015		3,485,168		$	1.31		2.53	$	63,067
Granted		3,525,000			0.78
Exercised		-			-
Forfeited or Expired		(2,699,500	)		0.93
Outstanding at September 30, 2016		4,310,668		$	1.11		3.12	$	54,100
Vested or Expected to Vest at September 30, 2016		4,310,668		$	1.11		3.12	$	54,100
Exercisable at September 30, 2016		2,042,832		$	1.23		1.92	$	31,600

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares			Weighted-Average Grant-Date Fair Value
Non-vested at December 31, 2015		1,323,669		$	1.22
Granted		3,525,000			0.28
Vested		(1,401,333	)		0.55
Forfeited or Expired		(1,179,500	)		0.53
Non-vested at September 30, 2016		2,267,836		$	0.53