Note 8 - Stock-based Compensation (Tables)

9 Months Ended

Oct. 01, 2023

Notes Tables

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

	Three Months Ended				Nine Months Ended
	October 1, 2023		October 2, 2022		October 1, 2023		October 2, 2022
Cost of revenue	$	73	$	44	$	239	$	217
Research and development		171		149		513		325
Selling, general and administrative		372		294		1,165		805
Total	$	616	$	487	$	1,917	$	1,347

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

	Shares Available for Grants
Balance at January 1, 2023		960
Authorized		—
Restricted stock units (RSUs) granted		(393	)
RSUs forfeited or expired		15
Options expired		2
Balance at October 1, 2023		584

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 October 1, 2023		73		$	24.24		2.13	$	—

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		393			8.07
Vested and released		(224	)		6.14
Forfeited		(15	)		6.73
Nonvested at October 1, 2023		784		$	7.02