Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2023

Stockholders Equity Note [Abstract]

Schedule of Compensation Cost

The cost that has been charged against income for stock-based compensation is set forth below (in thousands):

	Three Months Ended
	March 31, 2023		April 1, 2022
Employee stock options	$	2,977	$	2,327
Restricted stock		67		109
Restricted stock units		1,601		762
Performance stock units		1,106		382
Nonemployee stock options		314		314
Total stock-based compensation expense	$	6,065	$	3,894

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The Company recorded stock-based compensation costs in the following categories (in thousands):

	Three Months Ended
	March 31, 2023		April 1, 2022
Cost of sales	$	149	$	70
General and administrative		3,363		1,781
Selling and marketing		857		889
Research and development		1,696		1,154
Total stock-based compensation expense, net		6,065		3,894
Amounts capitalized as part of inventory		369		366
Total stock-based compensation expense, gross	$	6,434	$	4,260

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The risk-free rate is based on the U.S. Treasury yield curve corresponding to the expected term at the time of the grant.

	Three Months Ended
	March 31, 2023			April 1, 2022
Expected dividend yield		0	%		0	%
Expected volatility		60	%		54	%
Risk-free interest rate		3.96	%		1.71	%
Expected term (in years)		5.05			5.10

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity under the Plan for three months ended March 31, 2023 is presented below:

	Stock Options (in 000’s)			Minimum Exercise Price		Maximum Exercise Price
Outstanding at December 30, 2022		2,469
Granted		496
Exercised		(40	)
Forfeited or expired		(24	)
Outstanding at March 31, 2023		2,901		$	5.54	$	154.96
Exercisable at March 31, 2023		1,980

Schedule of Share-based Compensation, Restricted Stock, RSUs and PSUs Activity

A summary of restricted stock, RSUs and PSUs activity under the Plan for the three months ended March 31, 2023 is presented below (shares in thousands):

	Restricted Stock		RSUs			PSUs
Unvested at December 30, 2022		4		192			118
Granted		—		223			173
Vested		—		(80	)		(30	)
Forfeited or expired		—		(6	)		(11	)
Unvested at March 31, 2023		4		329			250