(5) Share-Based Payments (Details Narrative) - USD ($)	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Share-based Payment Arrangement [Abstract]
Stock options granted in the period	200,000	59,000
Stock options granted to outside directors in the period		60,000
Stock options exercised in the period	613,800
Shares repurchased for employees to facilitate exercise of their stock options	120,196
Share-based compensation expense recognized in the period (in thousands)	$ 27	$ 66