STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Summary of equity incentive program

A summary of our equity incentive program is as follows (in thousands):

	December 31, 2021
Common stock shares available for grant	—
Stock options outstanding	242
RSAs outstanding	—
RSUs outstanding	224
PSUs outstanding	67

Summary of time-based stock options

The following summarizes activities for the time-based stock options for the year ended December 31, 2021:

	Number of Shares Underlying Stock Options (in thousands)	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2020	828	$	8.16	4.36	$	2,628
Granted	—	—
Exercised	(326)	8.79
Canceled or expired	(260)	7.49
Outstanding as of December 31, 2021	242	$	8.04	4.44	$	—
Vested and expected to vest at December 31, 2021	222	$	8.08	4.40	$	—
Exercisable at December 31, 2021	132	$	8.41	4.11	$	—

Summary of restricted stock units activities

The following summarizes RSUs activities for the year ended December 31, 2021:

	Number of Restricted Stock Units  (in thousands)	Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2020	802	$	6.98	1.00	$	9,057
Granted	—	—
Released	(325)	7.48
Forfeited	(253)	6.66
Outstanding at December 31, 2021	224	$	6.66	0.56	$	1,280

Summary of restricted stock awards activities

The following summarizes RSA activities for the year ended December 31, 2021:

	Number of Restricted Stock Awards (in thousands)	Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Recognition Period (Years)
Outstanding at December 31, 2020	130	$	6.53	0.45
Granted	—	—
Released	(130)	6.53
Forfeited	—	—
Outstanding at December 31, 2021	—	$	—	0.00

Share-based Payment Arrangement, Outstanding Award, Activity, Excluding Option

The following summarizes PSU activities for the year ended December 31, 2021 (in thousands except for weighted average grant date fair value and weighted average remaining recognition period):

	Number of Market Condition-Based Restricted Stock Units (in thousands)	Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Recognition Period (Years)
Outstanding at December 31, 2020	250	$	6.20	2.08
Released	(23)	$	6.20
Forfeited	(160)	$	6.20
Outstanding at December 31, 2021	67	$	6.20	1.49

Summary of stock-based compensation expenses

The stock-based compensation related to all of our stock-based awards and ESPP for the years ended December 31, 2021 and 2020 is as follows (in thousands):

	For the Years Ended December 31,
	2021		2020
Stock options	$	386	$	1,062
RSUs, RSAs and PSUs	1,894		3,638
ESPP	58		56
Total	$	2,338	$	4,756
Sales and marketing	$	745	$	846
Research and development	742		870
General and administrative	851		3,040
Total	$	2,338	$	4,756

Summary of assumptions used to value option grants

The assumptions used to value options granted during 2020 under our equity incentive program are as follows:

Time-based stock options:
	For the Year Ended December 31, 2020
Expected life (in years)	4.2
Volatility	52%
Interest rate	1.0%
Dividend yield	—

Market condition based restricted stock units:
	For the Year Ended December 31, 2020
Expected life (in years)	1.2
Volatility	52%
Interest rate	1.0%
Dividend yield	—

We did not grant stock options or market condition based restricted stock units during the year ended December 31, 2021.