SHARE - BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2017

SHARE-BASED COMPENSATION.

Summary of share-based compensation expense

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Selling, general and administrative	$	2,949	$	2,633	$	5,769	$	6,216
Research and development		4		—		8		327
Total non-cash share-based compensation expense	$	2,953	$	2,633	$	5,777	$	6,543

Summary of option activity

		Weighted-		Weighted-
		Average		Average
	Underlying	Exercise		Remaining	Intrinsic
Stock Option Awards	Shares	Price		Contractual Term	Value
Outstanding at December 31, 2016	3,065	$	5.85	4.8 years
Granted	1,489	$	1.77
Exercised	(41)	$	2.63
Forfeited or expired	(488)	$	9.79
Outstanding at June 30, 2017	4,025	$	3.89	6.6 years	$	—
Exercisable at June 30, 2017	1,989	$	5.26	2.4 years	$	—

Summary of RSU, including PSU, activity

		Weighted-
	Underlying	Average
	Underlying	Grant Date
Restricted Stock Units, including PSUs	Shares	Fair Value
Nonvested restricted stock units at December 31, 2016	4,324	$	6.62
Granted	1,967	$	2.04
Vested	(1,150)	$	6.89
Forfeited or expired	(38)	$	4.95
Nonvested restricted stock units at June 30, 2017	5,103	$	4.81