Note 8 - Stock-based Compensation (Tables)

3 Months Ended

Apr. 04, 2021

Notes Tables

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

	Three Months Ended
	April 4,		March 29,
	2021		2020
Cost of revenue	$	36	$	12
Research and development		157		(464	)
Selling, general and administrative		175		54
Total	$	368	$	(398	)

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

	Shares Available for Grants
Balance at January 3, 2021		320
RSUs granted		(28	)
RSUs forfeited or expired		8
PRSUs forfeited or expired		238
Balance at April 4, 2021		538

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 3, 2021		121	$	28.46		3.75		—
Forfeited or expired		—		—
Exercised		—		—
Balance outstanding at April 4, 2021		121	$	28.46		3.12	$	—
Exercisable at April 4, 2021		121	$	28.46		3.12	$	—
Vested and expected to vest at April 4, 2021		121	$	28.46		3.12	$	—

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 3, 2021		800		$	4.99
Granted		28			5.03
Vested		(453	)		4.88
Forfeited		(247	)		5.08
Nonvested at April 4, 2021		128		$	5.20