SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2016

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of selected quarterly financial data (unaudited)

	2016 Quarter Ended
(in thousands)	March 31,		June 30,		September 30,		December 31,
Product sales	$	104,571	$	116,517	$	110,303	$	123,675
Total revenues		104,780		116,682		110,524		123,911
Gross margin on product sales		81,022		95,552		90,060		101,018
Income (loss) from operations		(4,314)		9,661		1,258		17,904
Net income (loss)		(20,917)		(10,541)		(12,894)		(44,368)
Basic net income (loss) per share	$	(0.34)	$	(0.17)	$	(0.21)	$	(0.72)
Diluted net income (loss) per share	$	(0.34)	$	(0.17)	$	(0.21)	$	(0.72)

	2015 Quarter Ended
	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 (loss)		(11,633)		(21,653)		(11,785)		(30,667)
Basic net income (loss) per share	$	(0.20)	$	(0.36)	$	(0.20)	$	(0.51)
Diluted net income (loss) per share	$	(0.20)	$	(0.36)	$	(0.20)	$	(0.51)