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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 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								Six Months Ended
		June 30, 2023				July 1, 2022				June 30, 2023				July 1, 2022
Employee stock options		$	3,479			$	2,457			$	6,456			$	4,784
Restricted stock			79				442				146				551
Restricted stock units			2,148				1,231				3,749				1,993
Performance stock units			2,403				1,310				3,509				1,692
Nonemployee stock options			314				314				628				628
Total stock-based compensation expense		$	8,423			$	5,754			$	14,488			$	9,648

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								Six Months Ended
		June 30, 2023				July 1, 2022				June 30, 2023				July 1, 2022
Cost of sales		$	223			$	106			$	372			$	176
General and administrative			3,695				2,806				7,058				4,587
Selling and marketing			2,492				1,324				3,349				2,213
Research and development			2,013				1,518				3,709				2,672
Total stock-based compensation expense, net			8,423				5,754				14,488				9,648
Amounts capitalized as part of inventory			528				652				897				1,018
Total stock-based compensation expense, gross		$	8,951			$	6,406			$	15,385			$	10,666

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								Six Months Ended
		June 30, 2023				July 1, 2022				June 30, 2023				July 1, 2022
Expected dividend yield			0	%			0	%			0	%			0	%
Expected volatility			58	%			54	%			59	%			54	%
Risk-free interest rate			3.41	%			3.27	%			3.87	%			1.83	%
Expected term (in years)			4.87				5.10				5.02				5.10

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity under the Plan for six months ended June 30, 2023 is presented below:

		Stock Options (in 000’s)				Minimum Exercise Price				Maximum Exercise Price
Outstanding at December 30, 2022			2,469
Granted			584
Exercised			(195	)
Forfeited or expired			(31	)
Outstanding at June 30, 2023			2,827			$	5.54			$	154.96
Exercisable at June 30, 2023			1,903

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 six months ended June 30, 2023 is presented below (shares in thousands):

		Restricted Stock				RSUs				PSUs
Unvested at December 30, 2022			4				192				118
Granted			10				259				178
Vested			(4	)			(80	)			(36	)
Forfeited or expired			—				(6	)			(11	)
Unvested at June 30, 2023			10				365				249

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