STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

SCHEDULE OF SHARE-BASED COMPENSATION, STOCK OPTIONS, ACTIVITY

A summary of the Company’s employee and non-employee stock option activity for the six months ended June 30, 2020 is presented below:

	Number of Shares			Weighted- Average Exercise Price
Outstanding – December 31, 2019		4,529,988		$	15.26
Granted		1,458,026		$	1.19
Exercised		(10,000	)	$	3.12
Forfeited		(867,432	)	$	11.78
Outstanding – June 30, 2020		5,110,582		$	11.84
Options exercisable, June 30, 2020		3,603,571		$	14.87

SCHEDULE OF SHARE-BASED COMPENSATION, RESTRICTED STOCK ACTIVITY

A summary of the Company’s employee and non-employee restricted-stock activity is presented below:

	Number of Shares
Unvested - December 31, 2019		1,843,001
Granted		3,401,036
Vested (1)		(832,910	)
Forfeited		(79,803	)
Unvested – June 30, 2020		4,331,324

(1) The number of vested restricted stock units includes shares that were withheld on behalf of employees to satisfy the minimum statutory tax withholding requirements.

SCHEDULE OF SHARE-BASED COMPENSATION RELATED TO RESTRICTED STOCK AWARDS AND STOCK OPTIONS

The stock-based compensation expense related to stock options, restricted stock awards, and the employee stock purchase plan was as follows (in thousands):

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
General and administrative expense	$	143	$	6,892	$	3,220	$	15,929
Research and development expense		404		1,481		367		2,565
Sales and marketing expense		16		245		197		413
Total stock-based compensation expense	$	563	$	8,618	$	3,784	$	18,907