STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement [Abstract]

Summary of Stock-based Compensation Expense

The following table summarizes stock-based compensation expense that the Company recorded in income (loss) from operations for the periods shown:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Selling and marketing	$	14	$	24	$	32	$	47
General and administrative	1,238		263		1,469		525
Research and development	777		444		1,428		783
Stock-based compensation expense	$	2,029	$	731	$	2,929	$	1,355
Capitalized stock-based compensation	$	111	$	141	$	320	$	302

Summary of Stock Option Activity

The following is a summary of stock option activity for time-based and performance-based options for the six months ended June 30, 2021 (in thousands, except weighted-average exercise price and remaining term):

	No. of Options	Weighted-Average Exercise Price		Weighted-Average Remaining Term (in Years)	Aggregate Intrinsic Value
Outstanding - December 31, 2020	18,090	$	0.85
Granted	128	7.85
Exercised	(2,233)	0.86
Forfeited	(267)	1.81
Expired	(22)	1.45
Outstanding - June 30, 2021	15,696	0.89		6.7	$	78,433
Unvested - June 30, 2021	5,793	0.98		8.0	27,885
Exercisable - June 30, 2021	9,903	0.84		6.0	50,548

Schedule of Weighted-average Assumptions

The following table presents the weighted-average assumptions used to estimate the fair value of the stock options granted in the Company’s consolidated financial statements:

	Six Months Ended June 30,
	2021	2020
Expected term (in years)	5.86	5.96
Expected volatility	51.24%	55.41%
Risk-free interest rate range	0.54% – 0.60%	0.41% – 0.51%
Dividend yield	0%	0%
Grant-date fair value	$0.52	$0.33