STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of stock-based compensation expense

Stock‑based compensation expense is included in the consolidated statements of income as follows:

	Year Ended December 31,
(In thousands)	2022		2021		2020
Selling, general and administrative	$	5,305	$	2,017	$	1,698
Research and development		2,042		—		—
Total	$	7,347	$	2,017	$	1,698

Schedule of stock-based compensation expense included in the consolidated statements of operations by award type

Stock‑based compensation expense included in the consolidated statements of income by award type is as follows:

	Year Ended December 31,
(In thousands)	2022		2021		2020
Stock options	$	3,057	$	490	$	242
RSUs		4,053		1,280		1,149
RSAs		194		200		273
ESPP		43		47		34
Total stock-based compensation expense	$	7,347	$	2,017	$	1,698

Schedule of unrecognized stock-based compensation cost

As of December 31, 2022, the unrecognized stock-based compensation cost and the estimated weighted-average amortization period were as follows:

(In thousands)	Unrecognized Compensation Cost		Weighted-Average Amortization Period (Years)
Stock options	$	3,550		2.9
RSUs		4,776		2.2
RSAs		388		2.6
Total unrecognized compensation expense	$	8,714

Summary of equity award activity and related information

The following table summarizes equity award activity under the 2012 Plan and prior plans and related information:

(In thousands, except per share data)	Number of outstanding options			Weighted-Average Exercise Price of Outstanding Options		Number of outstanding RSUs			Weighted-Average Fair Value per Share at Grant		Number of outstanding RSAs			Weighted-Average Fair Value per Share at Grant
Balance as of December 31, 2021		766		$	20.79		116		$	12.82		29		$	13.35
Granted		492		$	14.92		676		$	11.06		15		$	16.67
Exercised		(15	)	$	17.11		—		$	—		—		$	—
Released RSUs and RSAs		—		$	—		(233	)	$	9.90		(14	)	$	13.51
Forfeited		(295	)	$	28.01		(41	)	$	8.80		—		$	—
Balance as of December 31, 2022		948		$	15.56		518		$	12.16		30		$	14.97
Vested and expected to vest    as of December 31, 2022		948		$	15.56		518		$	12.16		—		$	—

Summary of weighted-average assumptions used to calculate estimated value of stock options

The weighted-average assumptions used in calculating the estimated value of our stock options on the date of grant as follows:

	Year Ended December 31,
	2022			2021			2020
Risk-free interest rate		3.6	%		1.1	%		0.4	%
Expected term (in years)		6.04			6.11			6.11
Volatility		38.6	%		44.9	%		46.9	%
Dividend yield		0.0	%		0.0	%		0.0	%
Weighted-average estimated fair value of stock options granted	$	6.43		$	5.84		$	6.28