SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2017

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Schedule of selected quarterly financial data (unaudited)

	2017 Quarter Ended
(in thousands)	March 31,		June 30,		September 30,		December 31,
Product sales	$	90,285	$	100,232	$	95,204	$	94,159
Total revenues		90,447		100,457		95,413		94,407
Gross margin on product sales		72,511		80,507		77,808		76,455
(Loss) income from operations		(6,665)		(4,068)		1,238		(32,685)
Net loss		(26,741)		(26,659)		(15,992)		(33,104)
Basic net loss per share	$	(0.43)	$	(0.43)	$	(0.25)	$	(0.52)
Diluted net loss per share	$	(0.43)	$	(0.43)	$	(0.25)	$	(0.52)

	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
Loss from operations		(4,314)		9,661		1,258		17,904
Net loss		(20,917)		(10,541)		(12,894)		(44,368)
Basic net loss per share	$	(0.34)	$	(0.17)	$	(0.21)	$	(0.72)
Diluted net loss per share	$	(0.34)	$	(0.17)	$	(0.21)	$	(0.72)