Note 3 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	As of March 31, 2013
	Level 1		Level 2		Level 3		Total
Liabilities:
Compensatory stock options not yet issued (1)	$	-	$	-	$	63,641	$	63,641
Accrued warrant liability		-		-		7,553,382		7,553,382
Total liabilities	$	-	$	-	$	7,617,023	$	7,617,023

	As of December 31, 2012
	Level 1		Level 2		Level 3		Total
Liabilities:
Accrued warrant liability	$	-	$	-	$	4,105,659	$	4,105,659
Total liabilities	$	-	$	-	$	4,105,659	$	4,105,659

Schedule of Share-based Payment Award, Warrant Liability, Valuation Assumptions [Table Text Block]

	March 31, 2013			December 31, 2012
Stock Price	$1.96			$1.33
Exercise Price	$1.60	-	5.00	$1.60	-	5.00
Term in years	0.96	-	2.28	1.09	-	2.41
Volatility	85.16	-	92.85%	82.75	-	95.91%
Annual rate of quarterly dividends	0%			0%
Discount rate- bond equivalent yield	0.13	-	0.28%	0.17	-	0.29%

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

	March 31, 2013
Stock price	$	1.96
Term in years		5
Volatility		82.31	%
Annual rate of quarterly dividends		0.0	%
Discount rate - bond equivalent yield		0.77	%

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Accrued Warrant Liability			Compensatory Stock Options Not Yet Issued
Balance, December 31, 2012	$	4,105,659		$	-
Total (gains) or losses, realized and unrealized, included in earnings (1)(2)		3,447,723			-
Estimates and other changes in fair value		-			63,641
Settlements		-			-
Balance, March 31, 2013	$	7,553,382		$	63,641
Balance, December 31, 2011	$	7,285,959		$	378,750
Total (gains) or losses, realized and unrealized, included in earnings (1)(2)		(1,719,756	)		51,823
Estimates and other changes in fair value		-			85,000
Settlements		-			(430,573	)
Balance, March 31, 2012	$	5,566,203		$	85,000
Amount of total gains or losses for the period included in earnings as change in value of warrant liability attributable to the change in unrealized gains or losses relating to liabilities recorded at the reporting date:
March 31, 2013	$	3,447,723		$	-
March 31, 2012	$	(1,719,756	)	$	-

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

	March 31, 2013
Description	Fair Value		Valuation Technique	Unobservable Input	Range
Compensatory stock options not yet issued	$	63,641	Black-scholes pricing model	Expected term - Years			5
				Quantity of options			200,000
Accrued warrant liability		7,553,382	Black-scholes pricing model	Expected term - Years	.96	-	2.28
	$	7,617,023