EQUITY- BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2020

EQUITY- BASED COMPENSATION

Summary of changes in unvested restricted stock

	Unvested RSUs
		Weighted
		Average
	Number of	Grant-date
	Shares	Fair Value
	shares in thousands
Unvested at December 31, 2019	951	$	2.15
Granted	2,696	$	0.70
Vested	(491)	$	2.36
Forfeited	(214)	$	1.11
Unvested at June 30,  2020	2,942	$	0.87

Summary of stock option activity

				Weighted
		Weighted		Average
		Average		Remaining		Aggregate
	Number of	Exercise		Contractual		Intrinsic
	Options	Price		Term		Value
	shares in thousands
Outstanding at December 31, 2019	7,837	$	1.49
Forfeited	(52)	$	2.28
Expired	(362)	$	1.43
Outstanding June 30, 2020	7,423	$	1.49	5.1	years	$	47
Exercisable at June 30, 2020	6,559	$	1.48	5.0	years	$	26

Schedule of compensation costs related to restricted stock and stock options

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Sales, general, and administrative	$	334	$	446	$	772	$	795
Research and Development		42		71		84		171
Total restricted stock and stock option compensation	$	376	$	517	$	856	$	966