Note 3 - Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	As of September 30, 2014
	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial assets
Cash equivalents	$	3,233	$	-	$	-	$	3,233
Government securities		18,447		-		-		18,447
Total	$	21,680	$	-	$	-	$	21,680
Financial liabilities
Derivative liability	$	-	$	-	$	11,903	$	11,903
Total	$	-	$	-	$	11,903	$	11,903

	As of December 31, 2013
	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial assets
Cash equivalents	$	2,781	$	-	$	-	$	2,781
Government securities		2,359		-		-		2,359
Total	$	5,140	$	-	$	-	$	5,140
Financial liabilities
Derivative liability		-		-		1,443		1,443
Total	$	-	$	-	$	1,443	$	1,443