SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2013

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of selected quarterly financial data (unaudited)

	2013 Quarter Ended
(in thousands)	March 31			June 30		September 30		December 31
Product sales	$	9,129		$	14,106	$	16,278	$	18,789
Total revenues		26,174			29,963		37,460		40,608
Gross margin on product sales		7,645			12,418		14,527		16,621
Income (loss) from operations		(5,533	)		532		6,838		7,480
Net income (loss)		(5,480	)		478		6,514		41,801
Basic net income (loss) per share	$	(0.10	)	$	0.01	$	0.11	$	0.73
Diluted net income (loss) per share	$	(0.10	)	$	0.01	$	0.11	$	0.72

	2012 Quarter Ended
	March 31			June 30			September 30			December 31
Product sales	$	2,109		$	3,201		$	9,684		$	12,489
Total revenues		16,835			14,110			33,282			26,590
Gross margin on product sales		1,591			1,759			7,921			10,173
Income (loss) from operations		(8,938	)		(15,983	)		(1,541	)		(3,891	)
Net income (loss)		(8,804	)		(15,780	)		(1,495	)		(3,704	)
Basic net income (loss) per share	$	(0.16	)	$	(0.28	)	$	(0.03	)	$	(0.07	)
Diluted net income (loss) per share	$	(0.16	)	$	(0.28	)	$	(0.03	)	$	(0.07	)