SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2014

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of selected quarterly financial data (unaudited)

	2014 Quarter Ended
(in thousands)	March 31		June 30		September 30		December 31
Product sales	$	21,506	$	28,245	$	30,584	$	33,884
Total revenues		76,544		67,732		51,485		194,601
Gross margin on product sales		17,804		23,570		27,061		30,638
Income from operations		35,744		26,545		16,700		157,822
Net income		17,939		12,746		6,454		94,623
Basic net income per share	$	0.31	$	0.22	$	0.11	$	1.61
Diluted net income per share	$	0.30	$	0.21	$	0.11	$	1.23

	2013 Quarter Ended
	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