Note 8 - Stock-based Compensation (Tables)

6 Months Ended

Jul. 02, 2023

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended				Six Months Ended
	July 2, 2023		July 3, 2022		July 2, 2023		July 3, 2022
Cost of revenue	$	88	$	117	$	166	$	173
Research and development		158		91		342		176
Selling, general and administrative		340		269		793		511
Total	$	586	$	477	$	1,301	$	860

Share-Based Payment Arrangement, Activity [Table Text Block]

	Shares Available for Grants
Balance at January 1, 2023		960
Authorized		—
RSUs granted		(55	)
RSUs forfeited or expired		9
Options expired		2
Balance at July 2, 2023		916

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

				Weighted		Weighted
				Average		Average		Aggregate
	Number of			Exercise		Remaining		Intrinsic
	Shares			Price		Term		Value
	(in thousands)					(in years)		(in thousands)
Balance outstanding at January 1, 2023		75		$	24.50		2.80	$	—
Forfeited or expired		(2	)	$	32.93
Balance outstanding, exercisable, and vested at July 2, 2023		73		$	24.24		2.38	$	—

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	RSUs & PRSUs Outstanding
				Weighted
				Average
	Number of			Grant Date
	Shares			Fair Value
	(in thousands)
Nonvested at January 1, 2023		630		$	6.05
Granted		55			6.11
Vested and released		(45	)		5.80
Forfeited		(9	)		7.25
Nonvested at July 2, 2023		631		$	6.05