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SHARE-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2023

Disclosure Of Compensation Related Costs Share-based Payments [Abstract]

Summary of Share-Based Compensation Expense

The amount of share-based compensation expense recognized by the Company by location in its Statements of Operations for the years ended December 31, 2023, 2022 and 2021 is as follows (in thousands):

​

​	​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	Years ended December 31,
​	​	​	​	2023		​	2022		​	2021
Cost of revenues	​	​	​	$	140	​	$	130	​	$	79
Sales and marketing	​	​	​		2,330	​		4,286	​		2,096
General and administrative	​	​	​		4,172	​		3,868	​		5,496
Research and development	​	​	​		677	​		462	​		198
Total	​	​	​	$	7,319	​	$	8,746	​	$	7,869

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity for the years ended December 31, 2023, 2022 and 2021:

​

​	​	​	​	​	​	​	​	​	​	​
​					​		Weighted-		Aggregate
​	​	Number of	​	Weighted-		​	average	​	average
​	​	Shares under	​	average		​	Remaining	​	Intrinsic
​	​	Option	​	Exercise Price		​	Contractual	​	Value
​	​	(in thousands)	​	per Option		​	Life (in years)	​	(in thousands)
Outstanding at December 31, 2020		2,365	​	$	4.62				​
Granted		—	​	$	—				​
Exercised		(698)	​	$	4.01				​
Forfeited		(168)	​	$	14.32				​
Outstanding at December 31, 2021		1,499	​	$	4.01				​
Granted		—	​	$	—				​
Exercised		(168)	​	$	1.77				​
Forfeited		(30)	​	$	13.81				​
Outstanding at December 31, 2022		1,301	​	$	4.07		​		​	​
Granted		—	​	$	—				​
Exercised		(1)	​	$	1.63		​		​
Forfeited		(30)	​	$	11.67				​
Outstanding at December 31, 2023		1,270	​	$	3.90		6.0		$	862
Exercisable at December 31, 2023		1,123	​	$	4.15		6.0		$	728
Vested and expected to vest at December 31, 2023		1,270	​	$	3.90		6.0		$	862

Summary of Restricted Stock Units and Performance Restricted Stock Units Activity

The following table summarizes the Company’s restricted stock unit and performance restricted stock unit activity for the years ended December 31, 2023, 2022 and 2021:

​

​	​	​	​	​	​	​	​	​	​	​
​		Non-vested		​	Weighted-		Non-vested		​	Weighted-
​	​	Restricted	​	​	average	​	PRSUs	​	​	average
​	​	Stock Units	​	​	Grant-date	​	​	​	​	Grant-date
​	​	(in thousands)	​	​	Fair Value	​	(in thousands)	​	​	Fair Value
Non-vested at December 31, 2020		1,860	​	$	3.58		500	​	$	1.71
Granted		1,008	​	$	11.51		145	​	$	15.59
Vested		(780)	​	$	3.63		(250)	​	$	1.77
Forfeited	​	(359)	​	$	7.86	​	—	​	$	—
Non-vested at December 31, 2021		1,729	​	$	7.29		395	​	$	6.77
Granted		2,902	​	$	3.36		—	​	$	—
Vested		(705)	​	$	7.32		—	​	$	—
Forfeited		(420)	​	$	5.35		—	​	$	—
Non-vested at December 31, 2022	​	3,506	​	$	4.29		395	​	$	6.77
Granted		1,674	​	$	4.68		—	​	$	—
Vested		(1,823)	​	$	4.32		—	​	$	—
Forfeited		(392)	​	$	5.50		—	​	$	—
Non-vested at December 31, 2023		2,965	​	$	4.37		395	​	$	6.77

Summary of Inputs and Assumptions in the Monte Carlo Simulation Valuation Model

​

​	​	​	​	​	​	​
​	​	​	​	2021
Closing price of common stock	​	​	​	$	15.92	​
Risk-free interest rate	​	​	​		1.15	%
Expected volatility	​	​	​		99.7	%

​

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of equity instruments other than options, including, but not limited to: (a) expected term of equity instruments other than options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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