STOCK-BASED COMPENSATION PLANS (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of activity related to outstanding stock options

The activity related to the Company's outstanding stock options for the three months ended March 31, 2020 was as follows:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2020	297,124		$	11.55
Granted	—		$	—
Exercised	(3,014	)	$	1.74
Forfeited	(1,470	)	$	1.80
Expired	(4,920	)	$	18.10
Outstanding at March 31, 2020	287,720		$	11.59	4.33	$	109
Vested or expected to vest at March 31, 2020	285,559		$	11.66	4.31	$	108
Exercisable at March 31, 2020	260,307		$	12.58	4.03	$	85

Schedule of stock options, additional information

Additional information regarding the Company's stock options for the three months ended March 31, 2020 was as follows (in thousands):

Total intrinsic value of stock options exercised	$	5
Cash received from the exercise of stock options	$	5

Schedule of activity related to unvested restricted stock grants

The activity related to the Company's RSAs for the three months ended March 31, 2020 was as follows:

	Shares		Weighted Average Grant Date Fair Value
Unvested balance at January 1, 2020	487,976		$	6.87
Granted	—		$	—
Vested	(89,920	)	$	7.04
Forfeited	(4,499	)	$	7.04
Unvested balance at March 31, 2020	393,557		$	6.83

The activity related to the Company's RSUs for the three months ended March 31, 2020 was as follows:

	Shares		Weighted Average Grant Date Fair Value
Unvested balance at January 1, 2020	2,790,060		$	5.11
Granted	4,123,151		$	2.22
Vested	(927,062	)	$	4.81
Forfeited	(237,818	)	$	4.69
Unvested balance at March 31, 2020	5,748,331		$	3.10

Schedule of activity related to performance stock awards

The activity related to the Company's PSUs for the three months ended March 31, 2020 was as follows:

	Shares		Weighted Average Grant Date Fair Value
Unvested balance at January 1, 2020	1,067,073		$	5.94
Granted	4,847,500		$	2.23
Vested	(315,866	)	$	5.53
Forfeited	(359,777	)	$	5.51
Unvested balance at March 31, 2020	5,238,930		$	2.52

Schedule of stock-based compensation expenses which are included in condensed consolidated statement of operations

The condensed consolidated statements of operations include stock-based compensation for the three months ended March 31, 2020 and 2019 as follows (in thousands):

	Three months ended
	March 31, 2020		March 31, 2019
Product cost of revenue	$	27	$	14
Service cost of revenue	130		92
Research and development	558		507
Sales and marketing	752		984
General and administrative	1,509		2,542
	$	2,976	$	4,139