Note 6 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

	Three-month period ended				Nine-month period ended
	September 30,		September 29,		September 30,		September 29,
	2020		2019		2020		2019
Stock options	$	204	$	117	$	674	$	433
Restricted stock grants		18		42		82		86
Total	$	222	$	159	$	756	$	519

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

	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
Outstanding at January 1, 2020		1,541,792		$	6.88
Granted		256,000			6.51
Exercised		(50,797	)		4.29
Forfeited or expired		(17,584	)		7.72
Outstanding at September 30, 2020		1,729,411		$	6.89		3.06	$	745
Vested and expected to vest at September 30, 2020		1,626,494		$	6.84		2.88	$	745
Exercisable at September 30, 2020		1,244,119		$	6.63		1.92	$	745

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Risk-Free Interest Rate	0.4	%
Volatility Factor	49	%
Weighted Average Expected Life (Years)	5.3
Dividends	0.0	%