Note 15 - Quarterly Financial Information (unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Three Months Ended
	March 31, 2014			June 30, 2014			September 30, 2014				December 31, 2014
Revenue	$	-		$	-		$	2,948			$	-
Operating expenses		1,933			2,508			2,814				3,273
Net (loss) income		(2,831	)		(2,563	)		(5,181	)			7,233
Net (loss) income attributable to common stockholders - basic		(4,343	)		(4,460	)		(7,458	)			5,938
Net (loss) income attributable to common stockholders - diluted		(4,343	)		(4,460	)		(7,458	)			5,938
Net (loss) income per share attributable to common stockholders:
Basic	$	(18.09	)	$	(18.55	)	$	(31.00	)	(a)	$	0.52
Diluted	$	(18.09	)	$	(18.55	)	$	(31.00	)	(a)	$	0.48
Weighted-average common shares outstanding used in net (loss) income per share attributable to common stockholders:
Basic		240,138			240,374			240,610		(a)		11,444,807	(b)
Diluted		240,138			240,374			240,610		(a)		12,295,431	(b)

	Three Months Ended
	March 31, 2013			June 30, 2013			September 30, 2013				December 31, 2013
Revenue	$	-		$	-		$	-			$	-
Operating expenses		1,871			1,549			1,914				1,788
Net loss		(1,865	)		(1,547	)		(2,103	)			(2,397	)
Net loss attributable to common stockholders - basic		(3,377	)		(3,074	)		(3,643	)			(3,937	)
Net loss attributable to common stockholders - diluted		(3,377	)		(3,074	)		(3,643	)			(3,937	)
Net loss per share attributable to common stockholders
Basic	$	(14.64	)	$	(13.33	)	$	(15.21	)	(a)	$	(16.41	)
Diluted	$	(14.64	)	$	(13.33	)	$	(15.21	)	(a)	$	(16.41	)
Weighted-average common shares outstanding used in net loss per share attributable to common stockholders:
Basic		230,607			230,607			239,472		(a)		239,902
Diluted		230,607			230,607			239,472		(a)		239,902