SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2015

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of selected quarterly financial data (unaudited)

	2015 Quarter Ended
(in thousands)	March 31			June 30			September 30			December 31
Product sales	$	31,670		$	94,295		$	104,726		$	111,059
Total revenues		32,203			94,504			104,856			111,172
Gross margin on product sales		28,558			71,430			83,812			90,052
Income (loss) from operations		(9,849	)		(17,214	)		3,235			(26,572	)
Net income		(11,633	)		(21,653	)		(11,785	)		(30,667	)
Basic net income per share	$	(0.20	)	$	(0.36	)	$	(0.20	)	$	(0.51	)
Diluted net income per share	$	(0.20	)	$	(0.36	)	$	(0.20	)	$	(0.51	)

	2014 Quarter Ended
	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 (loss) from operations		35,744		26,545		16,700		157,822
Net income (loss)		17,939		12,746		6,454		94,623
Basic net income (loss) per share	$	0.31	$	0.22	$	0.11	$	1.61
Diluted net income (loss) per share	$	0.30	$	0.21	$	0.11	$	1.23